Abstract

This document specifies a method for quantitative determination of various perfluorinated hydrocarbons by means of High-Performance Liquid Chromatography (HPLC) and mass spectrometry in soil, sludge, sediment and waste (see Table 1). For many substances to which this document applies a limit of quantification (LOQ) of 0.1 to 10 μg/kgdm can be achieved. The method can be applied to the analysis of additional PFAS not specified in the scope, if validity is proven by proper in-house validation protocols. For each target compound both, eventually occurring branched, isomers and the respective non-branched isomer are quantified together. In this method the amount of linear and branched PFAS is quantified using the response factor of the linear PFAS in the calibration standard and the total area of the linear and branched PFAS (Annex 1 gives more explanation)

Status
Not Published
Current Stage
5020 - FDIS ballot initiated: 2 months. Proof sent to secretariat
Start Date
12-Oct-2026
Completion Date
12-Oct-2026

Buy Documents

Draft

ISO/FDIS 25652 - Soil, sludge, waste, sediment — Analysis of perfluoroalkyl and polyfluoroalkyl substances (PFAS) by high performance liquid chromatography (HPLC) and mass spectrometry

Release Date:28-Sep-2026
English language (44 pages)
sale 15% off
sale 15% off
Draft

REDLINE ISO/FDIS 25652 - Soil, sludge, waste, sediment — Analysis of perfluoroalkyl and polyfluoroalkyl substances (PFAS) by high performance liquid chromatography (HPLC) and mass spectrometry

Release Date:28-Sep-2026
English language (44 pages)
sale 15% off
sale 15% off
Draft

ISO/FDIS 25652 - Sols, boues, déchets, sédiments — Analyse des substances perfluoroalkylées et polyfluoroalkylées (PFAS) par chromatographie en phase liquide à haute performance (CLHP) et spectrométrie de masse

Release Date:28-Oct-2026
French language (46 pages)
sale 15% off
sale 15% off

ISO/FDIS 25652 is an ISO draft document for the quantitative determination of PFAS in soil, sludge, sediment and waste by high performance liquid chromatography (HPLC) and mass spectrometry. It sets out how to prepare the sample, extract and clean up the analytes, calibrate the measurement, and report results for laboratories working with contaminated solid and semi-solid environmental matrices. The method also explains how linear and branched isomers are handled for target PFAS.

What does ISO/FDIS 25652 specify?

ISO/FDIS 25652 specifies a method for measuring selected PFAS in soil, sludge, sediment and waste. It also allows additional PFAS to be analysed if the laboratory proves suitability through in-house validation.

The document is organized into clauses on scope, principle, interferences, reagents, equipment, storage and extraction, calibration, evaluation, expression of results and test reporting. It also includes four informative annexes that support routine laboratory use.

AnnexWhat it covers
Annex AFlow chart of sample processing
Annex BExample chromatograms
Annex CExamples of chromatographic separation of linear and branched PFAS
Annex DValidation results

What are the key requirements of ISO/FDIS 25652?

ISO/FDIS 25652 is built around contamination control, isotope-dilution style calibration, and mass-spectrometric identification criteria. In practice, the user needs to control blanks, match calibration to the target matrix, and show that the chosen workflow works for the sample type being tested.

Sample handling, extraction and cleanup

  • Clause 8.1 requires analysis within 28 days, with separate storage guidance for sludge and soil. This matters because PFAS levels can change if samples are kept too long or under the wrong conditions.
  • Clause 8.2 requires drying of the sample, with drying temperatures limited to 40 °C and freeze-drying preferred for sewage sludge. This helps reduce losses of volatile PFAS.
  • Clause 8.3 describes extraction with methanol, acetonitrile, or a mixture of the two under basic conditions, with isotopically labelled PFAS added before extraction. In practice, the labelled compounds track losses during preparation.
  • Clause 8.4 allows an optional cleanup step, for example with activated carbon, followed by concentration under a gentle nitrogen stream. The document warns against drying to complete dryness because that can lose volatile compounds.

Instrument setup, blanks and calibration

  • Clause 8.5 requires HPLC-MS/MS measurement, normally in MRM mode with negative ionization, and gives advised transitions in Table 2. This is the core detection step, so the instrument must be tuned for the target PFAS.
  • Clause 8.7 requires a check of the instrumental detection limit in each measurement series. The practical meaning is that the lab must confirm the instrument is still sensitive enough before reporting results.
  • Clause 8.8 requires at least one method blank for each extraction series, and it sets action levels for blank contamination. This is important because PFAS contamination from lab materials can easily bias low-level results.
  • Clause 9 requires calibration with linear isomers using internal standards, and at least five calibration levels. The same section allows quadratic calibration if it gives a better fit, but the laboratory must still verify the curve with independent standards.

Evaluation, isomers and reporting

  • Clause 10.1 identifies compounds by retention time and transition ratios. That means the result is not based on one signal alone, but on chromatographic and mass-spectrometric agreement.
  • Clause 10.3 quantifies branched isomers together with the linear isomer using the response of the linear compound. This matters because environmental samples often contain mixed isomer patterns.
  • Clause 10.4 checks recovery of isotope-labelled standards, with acceptable recovery between 30 % and 200 %. In practice, this is the control that shows whether the method stayed within a usable performance window.
  • Clause 11 requires results to be reported as anion concentration in µg/kg DM. This gives one common reporting basis for soil, sludge, sediment and waste results.
  • Clause 12 requires the report to include the document reference, sample identification, report date, PFAS contents, observed peculiarities and any non-standard actions that may have influenced the result.

What terms does ISO/FDIS 25652 define?

  • PFAS - perfluoroalkyl and polyfluoroalkyl substances, meaning organic compounds in which most or all hydrogen atoms in the aliphatic chain are replaced by fluorine.
  • HPLC - high-performance liquid chromatography, the separation step used before mass spectrometric detection.
  • MS/MS - tandem mass spectrometry, used here to identify and quantify PFAS by selected transitions.
  • MRM - multiple reaction monitoring, the MS/MS acquisition mode used for target compounds in this method.
  • Internal standard - an isotope-labelled compound added to correct for losses during preparation, injection and matrix effects.
  • Branched isomer - a non-linear isomer of a PFAS target compound, which this method normally quantifies together with the linear form.
  • DM - dry matter, the basis used for reporting concentrations as µg/kg DM.
  • LOQ - limit of quantification, the lowest concentration level that the procedure can measure with usable confidence.

Who uses ISO/FDIS 25652?

ISO/FDIS 25652 is used by laboratories that analyse PFAS in soil, sludge, sediment and waste. It is also relevant to quality managers and method developers who need to validate extraction, cleanup, calibration and blank control for these matrices.

The introduction links the method to decisions about soil trading and the use of soil and dredged material in projects. In practice, that means it supports analytical work used by environmental consultants, project teams and buyers who need measured PFAS data before reuse, disposal or release decisions are made.

Which standards are used with ISO/FDIS 25652?

The document cites related standards for sampling, storage, sample preparation, dry matter calculation, calibration and result evaluation.

Related standardContribution in practice
ISO 5667-15Preservation and handling of sludge and sediment samples
ISO 18512Long and short term storage of soil samples
ISO 18400Soil sampling guidance
EN 15002Preparation of test portions from laboratory waste samples
EN 16179Sample pretreatment for sludge, treated biowaste and soil
EN 15934Calculation of dry matter fraction
ISO 21253-1:2019Identification criteria and transition-ratio tolerances
ISO 5725-2Repeatability and reproducibility statistics
ISO 8466-1Linear calibration function
ISO 8466-2Non-linear calibration strategy
ISO 21675:2019Related PFAS method for water
ISO 25101Related PFOS and PFOA method for water

What does the ISO/FDIS 25652 document contain?

ISO/FDIS 25652 contains a full laboratory workflow, from sample storage through extraction, cleanup, HPLC-MS/MS analysis, calibration and reporting. Clause 4 explains the principle, Clause 5 discusses contamination and matrix interferences, and Clauses 6 and 7 list reagents and equipment.

The document also includes the analytical detail needed for routine work: Tables 1 to 4, advised MRM transitions, internal standards, and calculation formulas for calibration and concentration. Annex B shows example chromatograms, Annex C shows how linear and branched PFAS can be separated and quantified, and Annex D summarizes validation data for several matrices.

Relations

Effective Date
12-Feb-2026
Effective Date
07-Jan-2025

Buy Documents

Draft

ISO/FDIS 25652 - Soil, sludge, waste, sediment — Analysis of perfluoroalkyl and polyfluoroalkyl substances (PFAS) by high performance liquid chromatography (HPLC) and mass spectrometry

Release Date:28-Sep-2026
English language (44 pages)
sale 15% off
sale 15% off
Draft

REDLINE ISO/FDIS 25652 - Soil, sludge, waste, sediment — Analysis of perfluoroalkyl and polyfluoroalkyl substances (PFAS) by high performance liquid chromatography (HPLC) and mass spectrometry

Release Date:28-Sep-2026
English language (44 pages)
sale 15% off
sale 15% off
Draft

ISO/FDIS 25652 - Sols, boues, déchets, sédiments — Analyse des substances perfluoroalkylées et polyfluoroalkylées (PFAS) par chromatographie en phase liquide à haute performance (CLHP) et spectrométrie de masse

Release Date:28-Oct-2026
French language (46 pages)
sale 15% off
sale 15% off

Get Certified

Connect with accredited certification bodies for this standard

CIS Institut d.o.o.

Personal Protective Equipment (PPE) certification body. Notified Body NB-2890 for EU Regulation 2016/425 PPE.

SA Slovenia Verified

Kiwa BDA Testing

Building and construction product certification.

RVA Netherlands Verified

Kmetijski inštitut Slovenije

Agricultural Institute of Slovenia. Soil testing, plant health, agricultural product analysis.

SA Slovenia Verified

Sponsored listings

Frequently Asked Questions

ISO/FDIS 25652 is a draft published by the International Organization for Standardization (ISO). Its full title is "Soil, sludge, waste, sediment — Analysis of perfluoroalkyl and polyfluoroalkyl substances (PFAS) by high performance liquid chromatography (HPLC) and mass spectrometry". This standard covers: This document specifies a method for quantitative determination of various perfluorinated hydrocarbons by means of High-Performance Liquid Chromatography (HPLC) and mass spectrometry in soil, sludge, sediment and waste (see Table 1). For many substances to which this document applies a limit of quantification (LOQ) of 0.1 to 10 μg/kgdm can be achieved. The method can be applied to the analysis of additional PFAS not specified in the scope, if validity is proven by proper in-house validation protocols. For each target compound both, eventually occurring branched, isomers and the respective non-branched isomer are quantified together. In this method the amount of linear and branched PFAS is quantified using the response factor of the linear PFAS in the calibration standard and the total area of the linear and branched PFAS (Annex 1 gives more explanation)

This document specifies a method for quantitative determination of various perfluorinated hydrocarbons by means of High-Performance Liquid Chromatography (HPLC) and mass spectrometry in soil, sludge, sediment and waste (see Table 1). For many substances to which this document applies a limit of quantification (LOQ) of 0.1 to 10 μg/kgdm can be achieved. The method can be applied to the analysis of additional PFAS not specified in the scope, if validity is proven by proper in-house validation protocols. For each target compound both, eventually occurring branched, isomers and the respective non-branched isomer are quantified together. In this method the amount of linear and branched PFAS is quantified using the response factor of the linear PFAS in the calibration standard and the total area of the linear and branched PFAS (Annex 1 gives more explanation)

ISO/FDIS 25652 is classified under the following ICS (International Classification for Standards) categories: 13.080.10 - Chemical characteristics of soils. The ICS classification helps identify the subject area and facilitates finding related standards.

ISO/FDIS 25652 has the following relationships with other standards: It is inter standard links to FprEN ISO 25652, ISO 24201:2025. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

ISO/FDIS 25652 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


FINAL DRAFT
International
Standard
ISO/TC 190/SC 3
Soil, sludge, waste, sediment —
Secretariat: DIN
Analysis of perfluoroalkyl and
Voting begins on:
polyfluoroalkyl substances (PFAS)
2026-10-12
by high performance liquid
Voting terminates on:
chromatography (HPLC) and mass
2026-12-07
spectrometry
Sédiments, sol, boues et déchets — Analyse des substances
perfluoroalkylées et polyfluoroalkylées (PFAS) par
chromatographie liquide à haute performance (CLHP) et
spectrométrie de masse
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/CEN PARALLEL PROCESSING LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
FINAL DRAFT
International
Standard
ISO/TC 190/SC 3
Soil, sludge, waste, sediment —
Secretariat: DIN
Analysis of perfluoroalkyl and
Voting begins on:
polyfluoroalkyl substances (PFAS)
by high performance liquid
Voting terminates on:
chromatography (HPLC) and mass
spectrometry
Sédiments, sol, boues et déchets — Analyse des substances
perfluoroalkylées et polyfluoroalkylées (PFAS) par
chromatographie liquide à haute performance (CLHP) et
spectrométrie de masse
© ISO 2026
All rights reserved.
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
This ISO publication is protected by copyright and is owned by ISO and/or its licensors.
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
The content of this ISO publication is provided under licence, not sold. Use is subject to the applicable licence terms issued by ISO,
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
an ISO member body, or an authorized third-party distributor.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
Except as required for implementation or expressly permitted by a separate licence, no part of this ISO publication may be
ISO/CEN PARALLEL PROCESSING
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
reproduced, distributed, modified, used, or made available in any form or by any means – electronic or mechanical, including
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
photocopying, scanning, recording, or posting on internal or external digital platforms. TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
Any use beyond the scope of the granted rights is prohibited and may result in legal action.
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
Reference number
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Interferences . 6
5.1 General .6
5.2 Interferences in the extraction and cleaning and processing of extracts .6
5.3 Interferences in the HPLC-MS/MS analysis .6
6 Reagents . 7
7 Equipment . 9
8 Sample storage, extraction and analytical procedure .10
8.1 Sample storage .10
8.2 Sample pretreatment .10
8.3 Extraction .10
8.4 Purification of the extract .11
8.5 HPLC-MS/MS analysis . 12
8.6 Chromatographic separation .14
8.7 Instrumental detection limit .14
8.8 Method blank . 15
9 Calibration .15
9.1 General . 15
9.2 Calibration of the method using an internal standard . 15
9.3 Concentration calculation based on calibration with internal standards .16
9.4 Handling of samples outside the scope of the calibration.17
10 Evaluation . 17
10.1 Identification .17
10.2 Validity of the calibration .18
10.3 Quantification of branched isomers .18
10.4 Recovery of isotope labelled standards .18
11 Expression of results . 19
12 Test report . 19
Annex A (informative) Flow chart .20
Annex B (informative) Example chromatograms .21
Annex C (informative) Examples of chromatographic separation of linear and branched PFAS .24
Annex D (informative) Validation results .27
Bibliography .43

iii
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO’s adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 190, Soil quality, Subcommittee SC 3, Chemical
and physical characterization, in collaboration with the European Committee for Standardization (CEN)
Technical Committee CEN/TC 444, Environmental characterization of solid matrices, in accordance with the
Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
Introduction
Perfluoroalkyl and polyfluoroalkyl substances (PFAS) are a large group of industrially produced fluorinated
hydrocarbons (alkyl substances). PFAS contain a fully (per-) or partially (poly-) fluorinated carbon chain.
The length normally ranges from 2 to 18 carbon atoms. The best known PFAS are PFOS (perfluorooctane
1)
sulfonic acid) and PFOA (perfluorooctanoic acid) .
Since 2018, explicit attention has been requested for PFAS residues in soil trading. Due to the potential
risks of the substance group or the lack of information about it, the target values for soil trading in some
countries are relatively low at the level of a few µg/kg. For this reason, in many cases the chemical analyses
are decisive in decision-making for soil trading and determining the possibilities for use of soil and dredged
material released in projects. Precisely because of the diffuse occurrence of PFAS and the relatively strict
target values, there is a generic need for a validated analysis method with a substantiated reporting limit
and uniformity in the analysis methods and the associated pre-treatment.
The need for validation and uniformity does not only affect chemical analysis. The sampling strategy and
method of performing the fieldwork also determine the final result. To this end, various guidelines have
been and will be provided in other contexts and assessment guidelines and protocols have been drawn up.
1) Both substances, PFOS and PFOA, consist of eight and seven fully fluorinated carbon atoms, respectively, with PFOS
additionally having a sulfonate as a “functional group” on the last carbon atom and PFOA a carboxyl group.

v
FINAL DRAFT International Standard ISO/FDIS 25652:2026(en)
Soil, sludge, waste, sediment — Analysis of perfluoroalkyl and
polyfluoroalkyl substances (PFAS) by high performance liquid
chromatography (HPLC) and mass spectrometry
WARNING — Persons using this document should be familiar with normal laboratory practice. This
document does not purport to address all of the safety problems, if any, associated with its use. It is
the responsibility of the user to establish appropriate safety and health practices.
IMPORTANT — Tests conducted in accordance with this document shall be carried out by suitably
trained staff.
1 Scope
This document specifies a method for quantitative determination of various perfluorinated and
polyfluorinated hydrocarbons by means of high-performance liquid chromatography (HPLC) and mass
spectrometry in soil, sludge, sediment and waste (see Table 1).
Annex D provides more information on the limits of quantification (LOQs) reachable with this procedure.
The method can be applied to the analysis of additional perfluoroalkyl and polyfluoroalkyl substances
(PFAS) not specified in the scope, if validity is proven by proper in-house validation protocols, particularly
for volatile compounds that can be lost during preparation.
For each target compound, all branched and non-branched are quantified together. In this method the
amount of linear and branched PFAS is quantified using the response factor of the linear PFAS in the
calibration standard and the total area of the linear and branched PFAS (Annex C gives more explanation).
Alternatively, the linear isomer and sum of branched isomers can be quantified separately and the sum of
both can be calculated provided a complete separation of the linear isomer from the branched isomers is
obtained.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
perfluoroalkyl and polyfluoroalkyl substances
PFAS
organic compounds with replacement of most or all hydrogen atoms by fluorine in the aliphatic chain
structure
Note 1 to entry: The term is used in the broader sense for perfluoroalkyl and polyfluoroalkyl substances (PFAS), and
perfluorinated and polyfluorinated compounds (PFC) as well.

[SOURCE: ISO 21675:2019, 3.1]
4 Principle
The compounds listed in Table 1 are extracted from the prepared, homogenized sample material with
methanol, acetonitrile or a mixture of the two under basic conditions after addition of isotopically
labelled PFAS compounds. The extracts are purified if necessary, for example with activated carbon. The
identification and quantification are performed by high performance liquid chromatography coupled with a
mass selective detector (HPLC-MS/MS). The content of each PFAS compound is calculated with the internal
standard method.
For many substances to which this document is applicable a limit of quantification (LOQ) of 0,01 to 0,1 µg/
kgDM can be achieved. See also Annex D.
All compounds of Table 1 were tested during an international inter laboratory trial in Europe in the period
December 2023 to April 2024. Table 1 specifies for which the criteria of an inter laboratory coefficient of
variation of reproducibility (C ) of 50 % was not reached. See Annex D for more details.
V,R
The validity of the procedure has been proven for soil, sediment and sludge samples and for a selection of
waste samples. For other waste types than mentioned in Annex D the laboratory shall validate the suitability
of the procedure of this standard.
NOTE For many compounds in the river clay, sediment and marine sediment sample Table 1 gives “Cons <” as
conclusion, where Annex D might show positive results. Annex D in that case shows the results of the few labs with a
positive result, where Table 1, based on all raw data, clarifies that most of the labs reported a “< ‒ value”.
Table 1 — Summary of the conclusions of the validation per compound and per matrix
a b
Abbr. Analyte Formula IUPAC name CAS-RN RivClay Sed MarSed Waste Soil Sludge
Perfluorobutanoic 2,2,3,3,4,4,4-
PFBA C4HF7O2 375–22–4 Yes (7) Yes Yes Yes
acid Heptafluorobutanoic acid
Perfluoropentanoic 2,2,3,3,4,4,5,5,5- 2706–
PFPeA C5HF9O2 - Cons < No Yes Yes Yes
acid Nonafluoropentanoic acid 90–3
Perfluorohexanoic 2,2,3,3,4,4,5,5,6,6,6-
PFHxA C6HF11O2 307–24–4 Yes Cons < Yes Yes Yes Yes
acid Undecafluorohexanoic acid
Perfluoroheptanoic 2,2,3,3,4,4,5,5,6,6,7,7,7-
PFHpA C7HF13O2 375–85–9 Yes Cons < Yes Yes Yes Yes
acid Tridecafluoroheptanoic acid
2,2,3,3,4,4,5,5,6,6,7,7,8,
Perfluorooctanoic
PFOA C8HF15O2 8,8- 335–67–1 Yes Yes Yes Yes Yes Yes
acid
Pentadecafluorooctanoic acid
Perfluorooctanoic
PFOA branched C8HF15O2
acid branched
2,2,3,3,4,4,5,5,6,6,7,7,8,
Perfluorononanoic
PFNA C9HF17O2 8,9,9,9- 375–95–1 Yes Cons < Yes Yes Yes Yes
acid
Heptadecafluoro-nonanoic acid
Perfluorononanoic
PFNA branched C9HF17O2
acid branched
2,2,3,3,4,4,5,5,6,6,7,7,8,
Perfluorodecanoic
PFDA C10HF19O2 8,9,9,10,10,10- 335–76–2 Yes Cons < Yes Yes Yes Yes
acid
Nonadecafluorodecanoic acid
a
IUPAC      International Union of Pure and Applied Chemistry
b
CAS-RN    Chemical Abstract Services Registry Number
The branched isomers mentioned in this table are examples, other branched isomers do exist.

RivClay    river clay
Sed        sediment
MarSed    marine sediment
Yes        criterion of CVR < 50 % was met with 8 or more laboratories
Yes(n)     criterion of CVR < 50 % was met with n laboratories
No         criterion was not met with 8 or more laboratories
Cons <     most of the results consistently < ‒ value

TTaabblle 1 e 1 ((ccoonnttiinnueuedd))
a b
Abbr. Analyte Formula IUPAC name CAS-RN RivClay Sed MarSed Waste Soil Sludge
2,2,3,3,4,4,5,5,6,6,7,7,8,
Perfluoroundeca- 2058–
PFUnDA C11HF21O2 8,9,9,10,10,11,11,11- Yes Cons < Yes Yes Yes Yes
noic acid 94–8
Henicosafluoroundecanoic acid
2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,
Perfluorododeca-
PFDoDA C12HF23O2 11,11,12,12,12- 307–55–1 Yes Cons < Yes Yes Yes Yes
noic acid
Tricosafluorododecanoic acid
2,2,3,3,4,4,5,5,6,6,7,7,8,
Perfluorotrideca- 8,9,9,10,10,11,11,12,12 72629–
PFTrDA C13HF25O2 Yes Cons < Yes Yes Yes No
noic acid ,13,13,13- 94–8
Pentacosafluorotridecanoic acid
2,2,3,3,4,4,5,5,6,6,7,7,8,
8,9,9,10,10,11,11,12,12
Perfluorotetra-de-
PFTeDA C14HF27O2 ,13,13,14,14,14 - 376–06–7 Cons < Cons < Yes Yes Yes Yes
canoic acid
Heptacosafluorotetra -decanoic
acid
2,2,3,3,4,4,5,5,6,6,7,7,8,
8,9,9,10,10,11,11,12,12
Perfluorohexa-de- ,13,13,14,14,15,15,16,1 67905–
PFHxDA C16HF31O2 Cons < Cons < Cons < Yes Yes Yes
canoic acid 6,16 - 19–5
Hentriacontafluorohexa -decanoic
acid
2,2,3,3,4,4,5,5,6,6,7,7,8,
8,9,9,10,10,11,11,12,12
Perfluorocta-deca- ,13,13,14,14,15,15,16,1 16517– Yes
PFODA C18HF35O2 Cons < Cons < Cons < Yes (6) Yes
noic acid 6,17,17,18,18,18 - 11–6 (7)
Pentatriacontafluoro -octadeca-
noic acid
1,1,2,2,3,3,4,4,4-
Perfluorobu-
PFBS C4HF9O3S Nonafluorobutane-1- 375–73–5 Cons < Cons < Yes Yes Yes Yes
tane-sulfonic acid
sulfonic acid
1,1,2,2,3,3,4,4,5,5,5-
Perfluoropen-
PFPeS C5HF11O3S Undecafluoropentane-1-sulfonic 2706–91–4 Cons < Cons < Cons < Yes Yes Yes
tane-sulfonic acid
acid
1,1,2,2,3,3,4,4,5,5,6,6,6-
Perfluorohex-
PFHxS C6HF13O3S Tridecafluorohexane-1-sulfonic 355–46–4 Yes Cons < Yes (6) Yes Yes Yes
ane-sulfonic acid
acid
Perfluorohex-
PFHxS branched ane-sulfonic C6HF13O3S
acid branched
1,1,2,2,3,3,4,4,5,5,6,6,7,7,
Perfluorohep- 7-
PFHpS C7HF15O3S 375–92–8 Yes Cons < Cons < Yes Yes Yes
tane-sulfonic acid Pentadecafluoroheptane-1-sul-
fonic acid
1,1,2,2,3,3,4,4,5,5,6,6,7,7,
Perfluorooc- 8,8,8-
PFOS C8HF17O3S 1763–23–1 Yes Yes Yes Yes Yes Yes
tane-sulfonic acid Heptadecafluorooctane-1-sulfonic
acid
Perfluorooc-
PFOS branched tane-sulfonic C8HF17O3S
acid branched
1,1,2,2,3,3,4,4,5,5,6,6,7,
Perfluoronon- 7,8,8,9,9,9- 68259–
PFNS C9HF19O3S Cons < Cons < Cons < Yes Yes Yes
ane-sulfonic acid Nonadecafluoro-nonane-1-sulfonic 12–1
acid
1,1,2,2,3,3,4,4,5,5,6,6,7,
Perfluorode- 7,8,8,9,9,10,10,10-
PFDS C10HF21O3S 335–77–3 Cons < Cons < Cons < Yes Yes Yes
cane-sulfonic acid Henicosafluorodecane-1-sulfonic
acid
a
IUPAC      International Union of Pure and Applied Chemistry
b
CAS-RN    Chemical Abstract Services Registry Number
The branched isomers mentioned in this table are examples, other branched isomers do exist.

RivClay    river clay
Sed        sediment
MarSed    marine sediment
Yes        criterion of CVR < 50 % was met with 8 or more laboratories
Yes(n)     criterion of CVR < 50 % was met with n laboratories
No         criterion was not met with 8 or more laboratories
Cons <     most of the results consistently < ‒ value

TTaabblle 1 e 1 ((ccoonnttiinnueuedd))
a b
Abbr. Analyte Formula IUPAC name CAS-RN RivClay Sed MarSed Waste Soil Sludge
1,1,2,2,3,3,4,4,5,5,6,6,7,7,
Perfluorounde- 8,8,9,9,10,10,11,11,11- 749786–
PFUnDS C11HF23O3S Cons < Cons < Cons < Yes No Yes
cane-sulfonic acid Tricosafluoroundecane-1-sulfonic 16–1
acid
1,1,2,2,3,3,4,4,5,5,6,6,7,
Perfluorodode- C12HF2 7,8,8,9,9,10,10,11,11,12,12,12- 79780–
PFDoDS Cons < Cons < Cons < Yes No Yes
cane-sulfonic acid 5O3S Pentacosafluorodo-decane-1-sul- 39–5
fonic acid
1,1,2,2,3,3,4,4,5,5,6,6,7,
7,8,8,9,9,10,10,11,11,12,12,13,1
Perfluorotride- 791563–
PFTrDS C13HF27O3S 3,13 - Cons < Cons < Cons < No No No
cane-sulfonic acid 89–8
Heptacosafluorodo-decane -1-sul-
fonic acid
4:2 Fluorotelomer 3,3,4,4,5,5,6,6,6- 757124–
4:2 FTS C6H5F9O3S Cons < Cons < Cons < Yes Yes Yes
sulfonic acid Nonafluorohexane-1-sulfonic acid 72–4
6:2 Fluorotelomer C8H5F1 3,3,4,4,5,5,6,6,7,7,8,8,8-Tride- 27619–
6:2 FTS Cons < Cons < Yes No Yes Yes
sulfonic acid 3O3S cafluorooctane-1-sulfonic acid 97–2
bis(3,3,4,4,5,5,6,6,7,7,8,
6:2 fluorotelomer C16H9F 57677–
6:2 diPAP 8,8-tridecafluorooctyl) hydrogen   Yes (4)
phosphate diester 26O4P 95–9
phosphate
3,3,4,4,5,5,6,6,7,7,8,8,9,
6:2 8:2 fluorotel- 9,10,10,10-
C18H9F 943913–
6:2 8:2 diPAP omer phosphate heptadecafluorodecyl Cons < Cons < Yes (4)
30O4P 15–3
diester 3,3,4,4,5,5,6,6,7,7,8,8,8-tride-
cafluorooctyl hydrogen phosphate
3,3,4,4,5,5,6,6,7,7,8,8,9,
8:2 Fluorotelomer C10H5F 9,10,10,10- 39108–
8:2 FTS Cons < Cons < Yes Yes Yes Yes
sulfonic acid 17O3S Heptadecafluorodecane-1-sulfonic 34–4
acid
3,3,4,4,5,5,6,6,7,7,8,8,9,
10:2 Fluorotel- C12H5F 9,10,10,11,11,12,12,12- 120226–
10:2 FTS Cons < Cons < Yes Yes Yes No
omer-sulfonic acid 21O3S Henicosafluorododecane-1-sul- 60–0
fonic acid
8:2 Fluorotelomer
C10H2F 3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10- 70887–
8:2 FTUCA unsaturated car- Cons < Cons < Cons < Yes (6) Yes Yes
16O2 Hexadecafluorodec-2-enoic acid 84–2
boxylic acid
Bis(3,3,4,4,5,5,6,6,7,7,8,
8:2 Perfluoroalkyl C20H9F 8,9,9,10,10,10-
8:2 diPAP 678–41–1 Cons < Cons < Yes Yes No Yes
phosphate diester 34O4P heptadecafluorodecyl) hydrogen
phosphate
1,1,2,2,3,3,4,4,5,5,6,6,7,
Perfluorooc- C8H2F- 7,8,8,8-
PFOSA 754–91–6 Yes Yes Yes Yes Yes Yes
tane-sulfonamide 17NO2S Heptadecafluoro-1-octanesulfo-
namide
Perfluorooc-
C8H2F-
PFOSA branched tane-sulfonamide
17NO2S
branched
1,1,2,2,3,3,4,4,5,5,6,6,7,
N-methylper-
C9H4F- 7,8,8,8-Heptadecafluoro-N-me- 31506– Yes
MePFOSA fluoro-octanesulfo- Cons < Yes (4) Cons < Yes (7) Yes
17NO2S thyl-1- 32–8 (7)
namide
octanesulfonamide
N-methylper-
C9H4F-
MePFOSA branched fluoro-octanesulfo-
17NO2S
namide branched
N-methylper- 2-[1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-
C11H6F-
MePFOSAA fluoro-octanesulfo- Heptadecafluorooctyl-sulfon- 2355–31–9 Cons < Yes Yes Yes Yes Yes
17NO4S
namidoacetic acid yl(methyl)amino]acetic acid
a
IUPAC      International Union of Pure and Applied Chemistry
b
CAS-RN    Chemical Abstract Services Registry Number
The branched isomers mentioned in this table are examples, other branched isomers do exist.

RivClay    river clay
Sed        sediment
MarSed    marine sediment
Yes        criterion of CVR < 50 % was met with 8 or more laboratories
Yes(n)     criterion of CVR < 50 % was met with n laboratories
No         criterion was not met with 8 or more laboratories
Cons <     most of the results consistently < ‒ value

TTaabblle 1 e 1 ((ccoonnttiinnueuedd))
a b
Abbr. Analyte Formula IUPAC name CAS-RN RivClay Sed MarSed Waste Soil Sludge
N-methylper-
fluoro-octanesulfo- C11H6F-
MePFOSAA branched
namidoacetic acid 17NO4S
branched
N-Eth
N-ethylper-
C10H6F- yl-1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8- Yes Yes
EtPFOSA fluoro-octanesulfo- 4151–50–2 Cons < Yes (7) Cons < Yes (6)
17NO2S heptadecafluorooctane-1-sulfo- (7) (7)
namide
namide
N-ethylper-
C10H6F-
EtPFOSA branched fluoro-octanesulfo-
17NO2S
namide branched
2-[Ethyl(1,1,2,2,3,3,4,4,5,5,6,6,7,
N-ethylperfluo-
C12H8F- 7,8,8,8- 2991–
EtPFOSAA rooctane-sulfona- Yes Yes Yes Yes Yes Yes
17NO4S heptadecafluoro-octylsulfonyl) 50–6
midoacetic acid
amino]acetic acid
N-ethylperfluo-
rooctane-sulfon- C12H8F-
EtPFOSAA branched
amidoacetic acid 17NO4S
branched
N-methylper-
C5H4F- N-Methyl-1,1,2,2,3,3,4,4,4- 68298–
MePFBSA fluoro-butanesulfo- Cons < Cons < Cons < Yes (5) Yes (6) Yes (6)
9NO2S nonafluorobutane-1-sulfonamide 12–4
namide
N-methylper- 2-[Methyl(1,1,2,2,3,3,4,4,4-
C7H6F- 159381–
MePFBSAA fluoro-butanesulfo- nonafluorobutylsulfonyl)amino] Cons < Cons < Cons < No Yes (6) Yes
9NO4S 10–9
namidoacetic acid acetic acid
2,2-difluoro-2-[1,1,2,2-
Nonafluoro-3,6-di- tetrafluoro-2- 151772–
NFDHpA C5HF9O4
oxaheptanoic acid (trifluoromethoxy)ethoxy]acetic 58–6
acid
1,1,2,2,3,3,4,4,5,5,6,6,6-Non-
Perfluorobu- C4H2F- 30334–
PFBSA afluoro-1- Cons < Cons < Cons < No Yes Yes
tane-sufonamide 9NO2S 69–1
butanesulfonamide
Perfluoro-3-meth- 2,2,3,3-tetrafluoro-3-(trifluo-
PFMPA C4HF7O3 377–73–1  Yes (3) Yes (3)
oxypropanoic acid romethoxy)propanoic acid
2,2,3-Trifluoro-3-[1,1,2,2,3,3-hex-
4,8-Dioxa-3H-per- afluoro-3- 919005–
DONA C7H2F12O4 Cons < Cons < Cons < Yes Yes Yes
fluorononanoic acid (trifluoromethoxy)propoxy] 14–4
propanoic acid
7H-Perfluorohepta- 2,2,3,3,4,4,5,5,6,6,7,7- 1546– Yes
HPFHpA C7H2F12O2 Cons < Cons < Cons < Yes Yes
noic acid Dodecafluoroheptanoic acid 95–8 (7)
Perfluoro-3–7-di- 2,2,3,4,4,5,5,6,6,7,8,8,8-Tride-
172155– Yes
P37DMOA methyloctanoic C10HF19O2 cafluoro-3,7- Cons < Cons < Cons < Yes (7) Yes
07–6 (7)
acid bis(trifluoromethyl)octanoic acid
1,1,2,2,3,3,4,4,5,5,6,6,6-
Perfluorohex- C6H2F- 41997–
PFHxSA tridecafluorohexane-1-sulfona- Cons < Cons < Cons < Yes (7) Yes (6) Yes (5)
ane-sulfon-amide 13NO2S 13–1
mide
Perfluoro-4-meth- 2,2,3,3,4,4-hexafluoro-4- 863090–
PFMBA C5HF9O3
oxybutanoic acid (trifluoromethoxy)butanoic acid 89–5
9-Chlorohexade- 2-(6-Chloro-1,1,2,2,3,3,4,4,5,5,6,6-
C8HCl- 756426-
9Cl-PF3ONS cafluoro-3-oxanon- dodecafluorohexoxy)-1,1,2,2- Cons < Cons < Cons < Yes Yes Yes
F16O4S 58-1
ane-1-sulfonic acid tetrafluoroethanesulfonic acid
2H,2H,3H,3H-per- 4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,1
34598–
4H-PFUnDA fluoro undecanoic C11H5F17O2 1,11- Cons < Cons < Yes Yes (6) No Yes
33–9
acid Heptadecafluoroundecanoic acid
a
IUPAC      International Union of Pure and Applied Chemistry
b
CAS-RN    Chemical Abstract Services Registry Number
The branched isomers mentioned in this table are examples, other branched isomers do exist.

RivClay    river clay
Sed        sediment
MarSed    marine sediment
Yes        criterion of CVR < 50 % was met with 8 or more laboratories
Yes(n)     criterion of CVR < 50 % was met with n laboratories
No         criterion was not met with 8 or more laboratories
Cons <     most of the results consistently < ‒ value

TTaabblle 1 e 1 ((ccoonnttiinnueuedd))
a b
Abbr. Analyte Formula IUPAC name CAS-RN RivClay Sed MarSed Waste Soil Sludge
1,2,2,3,3,4,5,5,6,6-de-
perfluoro-4-ethyl-
cafluoro-4-(1,1,2,2,2- Yes
4-PFECHS cyclohexane C8HF15O3S 646–83–3 Cons < Cons < Cons < Yes (6)
pentafluoroethyl)cyclohex- (7)
sulfonic acid
ane-1-sulfonic acid
2,3,3,3-Tetrafluo
Perfluoro-2–
ro-2-(1,1,2,2,3,3,3- 13252–
HFPO-DA propoxypropanoic C6HF11O3 Cons < Cons < Cons < Yes Yes Yes
heptafluoropropoxy)-propanoic 13–6
acid
acid
a
IUPAC      International Union of Pure and Applied Chemistry
b
CAS-RN    Chemical Abstract Services Registry Number
The branched isomers mentioned in this table are examples, other branched isomers do exist.

RivClay    river clay
Sed        sediment
MarSed    marine sediment
Yes        criterion of CVR < 50 % was met with 8 or more laboratories
Yes(n)     criterion of CVR < 50 % was met with n laboratories
No         criterion was not met with 8 or more laboratories
Cons <     most of the results consistently < ‒ value
5 Interferences
5.1 General
In particular, process interferences can be caused by contact of the sample with polytetrafluoroethylene
(PTFE) materials. To avoid raised blank values, materials of glass, steel, polyether ether ketone (PEEK),
polypropylene (PP) or high density polyethylene (HDPE) should preferably be used for sampling, extraction
and analysis.
5.2 Interferences in the extraction and cleaning and processing of extracts
Efforts should be taken to minimize background levels in method blank materials such that the method
blank is maximum half of the reporting limit (8.8). Low molecular residuals in fluoropolymer-containing
materials such as Viton (fluorocarbon rubber), PVDF (polyvinylideenfluoride), etc., which are often used in
LC equipment, can cause blank values, e.g. in the case of PFOA. Sampling vessels (7.1) and sample vials (7.4)
shall be checked for possible background contamination before use.
5.3 Interferences in the HPLC-MS/MS analysis
Either peak tailing, peak fronting or broadened peaks or a combination of one of these are indicative of
interferences in chromatography. Sample matrix components can affect the ionization of the target
substances. This can result in suppression or enhancement of the ionization. Such matrix interferences
can be detected and corrected by using authentic isotopically labelled internal standards. Substances with
similar retention times that can produce ions with similar mass to charge ratios (m/z) to those produced
by the target analytes can interfere with the determination. These interferences can lead to incompletely
resolved signals and/or additional signals in the mass chromatograms of target substances. Depending on
their levels in the sample, such substances can affect the accuracy and precision of the results. As long as the
peak of interest can be separately integrated from interferences, it may be used.
Typical contamination sources in the LC system include vacuum degassers, frits and tubes as well as pump
head seals. In the case of such interferences, degassing of the eluents, for example, can be carried out using
helium instead of vacuum degassers. Fluoropolymer frits and tubes shall be replaced by frits and tubes
made of stainless steel or PEEK. If available, pump head seals made of PE shall be used.
A delay column supports avoiding background contamination from within the instrument (7.13).

6 Reagents
Always use certified or analytical grade reagents whenever possible. Store the reagents in glass or
polypropylene bottles (7.10) fitted with a metal or polypropylene lid. Avoid using lids containing
fluoropolymers and verify reagents are free from contaminants by taking regular blank measurements, see
the method blank procedure (8.8).
6.1 Ultrapure water, H O, deionized.
6.2 Acetonitrile, CH CN.
6.3 Methanol, CH OH.
6.4 Sodium hydroxide, NaOH, alternatively ammonium hydroxide, NH OH, can be used.
6.5 Acetic acid, CH COOH, > 96 % (mass fraction).
6.6 Ammonium formate, NH HCO , alternatively ammonium acetate NH CO CH or ammonium
4 2 4 2 3
carbonate (NH ) CO can be used.
4 2 3
6.7 Extraction solvent, acetonitrile: methanol (1:1) with 0,05 mol/l sodium hydroxide.
Weigh e.g. 2 g sodium hydroxide (6.4) into a mixture of 500 ml acetonitrile (6.2) and 500 ml methanol (6.3).
Other solvents with similar chemical properties and other concentrations of sodium hydroxide than those
described here may be used, provided that comparability with the operating procedure of the present
standard is demonstrated.
6.8 Conditioning fluid, ac e t on it r i le: me t h a nol: w at er (1:1:1) .
Mix e.g. 250 ml of water (6.1) with 250 ml of acetonitrile (6.2) and 250 ml of methanol (6.3).
6.9 Elution liquid, acetonitrile: methanol (1:1) with 0,05 mol/l acetic acid.
Add e.g. 0,3 ml acetic acid (6.5) to a mixture of 50 ml acetonitrile (6.2) and 50 ml methanol (6.3).
6.10 Mobile phase, ammonium formate eluate solution with 5 % methanol.
Weigh e.g. 1,2 g of ammonium formate (6.6) into a mixture of 3 800 ml of water (6.1) and 200 ml of methanol
(6.3).
6.11 Reference standards.
Only use reference standards that consist of at least 95 % (mass fraction) of the linear isomer, for the
quantitative determination of the analytes (see Table 1).
NOTE Ampoules of individual compounds or mixtures thereof are commercially available.
6.12 Isotope labelled standards.
Isotope labelled standards are used for internal standard calibration. This allows correction for loss during
the analytical process or other changes in analytical conditions that can lead to bias.
NOTE Ampoules of individual isotope labelled standards or mixtures thereof are commercially available.

6.13 Stock, intermediate and calibration solutions.
Calculate the concentration of all reference and calibration solutions on the basis of the dissolved anion
amount (neutral compound). All solutions are stored in the dark at 5 ± 3 °C. The solutions have a shelf life of
at least one year. The solutions are brought to room temperature before use. For some compounds sonication
or vortex, or both, is required.
6.13.1 Stock solutions of reference standards.
Prepare stock solutions of the reference standards (6.11) in acetonitrile (6.2) or methanol (6.3).
6.13.2 Stock solutions from isotope labelled standards.
Prepare stock solutions of the isotope-labelled standards solutions (6.12) in acetonitrile (6.2) or methanol
(6.3).
NOTE 13C HFPO-DA is not stable in acetonitrile.
6.13.3 Stock solutions of reference standards for QC for verification of the calibration curve.
Prepare stock solutions of independent reference standards (6.11) in acetonitrile (6.2) or methanol (6.3).
Independent reference standards are preferably obtained from different suppliers. A minimum of one third
of the analytes in the stock solutions of reference standards (6.13.1) should be present in the calibration
verification solution. Each calibration verification solution should, if relevant for the compounds to be
analysed, contain representative compounds for at least the following groups:
— perfluorated carboxylic acids: PFBA, PFHxA, PFOA, PFDA, PFTeDA, PFODA;
— perfluorated sulfonic acids: PFBS, PFHxS, PFOS, PFDS, PFDoDS;
— fluorotelomers: 4:2 FTS, 10:2 FTS;
— perfluoro-sulfonamides: PFBSA;
— perfluoro-sulfonamide acetic acids: EtPFOSAA, MePFOSAA;
— various: DONA, 4-PFECHS, HFPO-DA, 8:2 diPAP.
Preferably use standards from a different supplier for the calibration verification solution or at least different
mixtures from the same supplier (if available).
NOTE HFPO-DA is not stable in acetonitrile.
6.13.4 Intermediate solution of reference standards.
Prepare an intermediate solution of the stock solutions of reference standards (6.13.1) in methanol (6.3) or
acetonitrile (6.2) (the same as used for the stock solution) at a concentration of e.g. 0,2 µg/ml.
6.13.5 Intermediate solution of isotope-labelled standards.
Prepare an intermediate solution of the stock solutions of isotope-labelled standards (6.13.2) in methanol
(6.3) or acetonitrile (6.2) (the same as used for the stock solution) with a concentration of e.g. 0,2 µg/ml.
6.13.6 Intermediate solution of reference standards for QC verification of the calibration curve.
Prepare an intermediate solution of the stock solutions of independent reference standards for QC
verification of the calibration curve (6.13.3) in methanol (6.3) or acetonitrile (6.2) (the same as used for the
stock solution) with a concentration of e.g. 0,2 µg / ml.

6.13.7 Calibration solutions from reference standards.
This is a series of multi-component calibration solutions (at least five different solutions) in increasing
concentration prepared in methanol (6.3) or acetonitrile (6.2) (the same as used for the stock solution)
from the intermediate solution of reference standards (6.13.4) with a concentration range of, as an example,
0,02 ng/ml to 20 ng/ml. A fixed amount of the isotope-labelled standards (6.13.5) intermediate solutions are
added to each calibration solution.
NOTE Instead of adding the isotope labelled standards to the calibration solutions, injection can also be performed
by the instrument.
6.13.8 Spike solution isotope-labelled standards.
Prepare a spike solution of the intermediate isotope-labelled standards (6.13.5) in methanol (6.3) or
acetonitrile (6.2) (the same as used for the stock solution) with a concentration of e.g. 0,02 µg/ml. The
concentration level should be at least three times the corresponding level of the limit of quantification.
6.13.9 Solutions of independent standards for verification of the calibration curve.
Prepare two solutions in methanol (6.3) or acetonitrile (6.2) (the same as used for the stock solution) from
the intermediate solution of independent standards for verification of the calibration curve (6.13.6) with a
concentration preferably in the beginning and end of the calibration range.
6.14 Purification columns; disposable adsorption material.
2)
— SPE (solid phase extraction) adsorption material: activated carbon, such as ENVI-Carb .
— Other adsorption materials may be used provided equivalent results are obtained. Good results are
obtained using 250 mg/ 6 ml tubes.
6.15 Nitrogen gas, N .
6.16 Silver sand.
6.17 Neutralization solution.
Weigh e.g. 3,8 g ammonium acetate (6.6) in 100 ml water (6.1).
7 Equipment
All equipment and utensils that come into contact with the sample or extract shall be free from PFAS
contaminants analysed. If a background signal of PFAS is observed, the equipment and utensils used should
be cleaned with water (6.1) and methanol (6.3). All equipment shall be calibrated or checked according to
official standards or proprietary internal procedures.
7.1 Sample containers with screw cap, free from background signal.
Sample containers made of glass, polypropylene, PET or high-density polyethylene (HDPE) or stainless steel.
7.2 Balance, with a resolution of at least 1 % of the weighed amount.
7.3 Syringes.
7.4 Test tubes, sampling vials of appropriate volume, e.g. made of polypropylene.
2) ENVI-Carb is an example of a suitable product available commercially. This information is given for the convenience
of users of this document and does not constitute an endorsement by ISO of this product.

7.5 Pasteur pipettes.
7.6 Pipettes of appropriate volume.
7.7 Evaporation block.
7.8 Shaking device, with horizontal movement (200 to 300 strokes per min).
7.9 Centrifuge.
7.10 Polypropylene containers.
7.11 Liquid chromatograph with gradient set-up with mass spectrometer.
Mass spectrometric detector (MS/MS), preferably tandem mass spectrometer with electrospray ionization
(ESI).
NOTE For the procedure described in this standard, other MS techniques can be used as well, e.g. time-of-flight
mass spectrometry (TOF/MS), provided the identification of the analytes has been verified and documented for the
respective applications.
7.12 “Reversed phase” HPLC column, C18 or equivalent.
7.13 Delay column.
Background contamination from the instrument can be controlled by using a delay column. A delay colum
...


ISO/DISFDIS 25652
ISO/TC 190/SC 3
Secretariat: DIN
Date: 2026-01-0509-28
Soil, sludge, waste, sediment — Analysis of perfluoroalkyl and
polyfluoroalkyl substances (PFAS) by high performance liquid
chromatography (HPLC) and mass spectrometry
Les sédiments, leSédiments, sol, les boues et les déchets — Analyse des substances perfluoroalkylées et
polyfluoroalkylées (PFAS) par HPLCchromatographie liquide à haute performance (CLHP) et spectrométrie de
masse
FDIS stage
Warning for WD’s and CD’s
All rights reserved.
This document is ISO publication is protected by copyright and is owned by ISO and/or its licensors.
The content of this ISO publication is provided under licence, not an ISO International Standard. It is distributed for
review and comment. Itsold. Use is subject to change without notice and may not be referred tothe applicable licence
terms issued by ISO, an ISO member body, or an authorized third-party distributor.
Except as an International Standard.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which
they are aware and to provide supporting documentation.

ISO/DISFDIS 25652:20252026(en)
All rights reserved. Unless otherwise specified, or required in the context of its for implementation or expressly permitted
by a separate licence, no part of this ISO publication may be reproduced or utilized otherwise, distributed, modified, used,
or made available in any form or by any means, – electronic or mechanical, including photocopying, scanning, recording,
or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO
at the address below or ISO’s member body in the country of the requesterinternal or external digital platforms.
Any use beyond the scope of the granted rights is prohibited and may result in legal action.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
E-mailEmail: copyright@iso.org
Website: www.iso.org
Published in Switzerland
iii
ISO/DISFDIS 25652:20252026(en)
Contents
Foreword . v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Interferences . 8
5.1 General . 8
5.2 Interferences in the extraction and cleaning and processing of extracts . 8
5.3 Interferences in the HPLC-MS/MS analysis . 8
6 Reagents . 9
7 Equipment . 11
8 Sample storage, extraction and analytical procedure . 12
8.1 Sample storage . 12
8.2 Sample pretreatment . 12
8.3 Extraction . 13
8.4 Purification of the extract . 13
8.5 HPLC-MS/MS analysis . 14
8.6 Chromatographic separation. 17
8.7 Instrumental detection limit . 17
8.8 Method blank . 17
9 Calibration . 18
9.1 General . 18
9.2 Calibration of the method using an internal standard . 18
9.3 Concentration calculation based on calibration with internal standards . 19
9.4 Handling of samples outside the scope of the calibration . 20
10 Evaluation . 20
10.1 Identification . 20
10.2 Validity of the calibration . 21
10.3 Quantification of branched isomers . 21
10.4 Recovery of isotope labelled standards . 21
11 Expression of results . 22
12 Test report . 22
Annex A (informative) Flow chart . 23
Annex B (informative) Example chromatograms . 25
Annex C (informative) Examples of chromatographic separation of linear and branched PFAS . 29
Annex D (informative) Validation results . 35
Bibliography . 58

iv
ISO/DISFDIS 25652:20252026(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of
ISO documentdocuments should be noted. This document was drafted in accordance with the editorial rules
of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights
in respect thereof. As of the date of publication of this document, ISO [had/had not] received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that this
may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO'sISO’s adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 190, Soil quality, Subcommittee SC 3, Chemical
and physical characterization, in collaboration with the European Committee for Standardization (CEN)
Technical Committee CEN/TC 444, Environmental characterization of solid matrices in collaboration with
Technical Committee ISO/TC 190, Soil quality, Subcommittee SC 3, Chemical and physical characterization, in ,
in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
v
ISO/DISFDIS 25652:20252026(en)
Introduction
Per-Perfluoroalkyl and polyfluoroalkyl substances (PFAS) isare a large group of industrially produced
fluorinated hydrocarbons (alkyl substances). PFAS contain a fully (per-) or partially (poly-) fluorinated carbon
chain. The length normally ranges from 2 to 18 carbon atoms. The best known PFAS are PFOS (perfluorooctane
1)
sulfonic acid) and PFOA (perfluorooctanoic acid) .
Since 2018, explicit attention has been requested for PFAS residues in soil trading. Due to the potential risks
of the substance group or the lack of information about it, the target values for soil trading in some countries
are relatively low at the level of a few µg / /kg. For this reason, in many cases the chemical analyses are decisive
in decision-making for soil trading and determining the possibilities for use of soil and dredged material
released in projects. Precisely because of the diffuse occurrence of PFAS and the relatively strict target values,
there is a generic need for a validated analysis method with a substantiated reporting limit and uniformity in
the analysis methods and the associated pre-treatment.
The need for validation and uniformity does not only affect chemical analysis. The sampling strategy and
method of performing the fieldwork also determine the final result. To this end, various guidelines have been
and will be provided in other contexts and assessment guidelines and protocols have been drawn up.

1)
Both substances, PFOS and PFOA, consist of eight and seven fully fluorinated carbon atoms, respectively, with PFOS
additionally having a sulfonate as a "“functional group"” on the last carbon atom and PFOA a carboxyl group.

vi
ISO/DISFDIS 25652:20252026(en)
Soil, sludge, waste, sediment — Analysis of perfluoroalkyl and
polyfluoroalkyl substances (PFAS) by high perfomanceperformance
liquid chromatography (HPLC) and mass spectrometry
WARNING — Persons using this document should be familiar with normal laboratory practice. This
document does not purport to address all of the safety problems, if any, associated with its use. It is
the responsibility of the user to establish appropriate safety and health practices.
IMPORTANT — Tests conducted in accordance with this document shall be carried out by suitably
qualifiedtrained staff.
1 Scope
This document specifies a method for quantitative determination of various per-perfluorinated and
polyfluorinated hydrocarbons by means of high-performance liquid chromatography (HPLC) and mass
spectrometry in soil, sludge, sediment and waste (see Table 1).
Annex D provides more information on the LOQ’slimits of quantification (LOQs) reachable with this
procedure.
The method can be applied to the analysis of additional perfluoroalkyl and polyfluoroalkyl substances (PFAS)
not specified in the scope, if validity is proven by proper in-house validation protocols, particularly for volatile
compounds that can be lost during preparation.
For each target compound, all branched and non-branched are quantified together. In this method the amount
of linear and branched PFAS is quantified using the response factor of the linear PFAS in the calibration
standard and the total area of the linear and branched PFAS ((Annex C gives more explanation).
Alternatively, the linear isomer and sum of branched isomers can be quantified separately and the sum of both
can be calculated provided a complete separation of the linear isomer from the branched isomers is obtained.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1
perfluoroalkyl and polyfluoroalkyl substances
PFAS
organic compounds with replacement of most or all hydrogen atoms by fluorine in the aliphatic chain
structure
Note 1 to entry: The term is used in the broader sense for per-perfluoroalkyl and polyfluoroalkyl substances (PFAS), and
perperfluorinated and polyfluorinated compounds (PFC) as well.
ISO/DISFDIS 25652:20252026(en)
[SOURCE: ISO 21675:2019, 3.1]
4 Principle
The compounds listed in Table 1 are extracted from the prepared, homogenized sample material with
methanol, acetonitrile or a mixture of the two under basic conditions after addition of isotopically labelled
PFAS compounds. The extracts are purified if necessary, for example with activated carbon. The identification
and quantification are performed by high performance liquid chromatography coupled with a mass selective
detector (HPLC-MS / /MS). The content of each PFAS compound is calculated with the internal standard
method.
For many substances to which this document is applicable a limit of quantification (LOQ) of 0,01 to 0,1
µg/kgDM can be achieved. See also Annex DAnnex D.
All compounds of Table 1 were tested during an international inter laboratory trial in Europe in the period
December 2023 to April 2024. Table 1The table specifies for which the criteria of an inter laboratory
coefficient of variation of reproducibility (C C ) of 50 % was not reached. See Annex D for more details.
VR V,R
The validity of the procedure has been proven for soil, sediment and sludge samples and for a selection of
waste samples. For other waste types than mentioned in Annex D the laboratory shall validate the suitability
of the procedure of this standard.
Note NOTE For many compounds in the river clay, sediment and marine sediment sample Table 1Table 1 gives
“Cons <” as conclusion, where Annex DAnnex D might show positive results. Annex DAnnex D in that case shows the
results of the few labs with a positive result, where Table 1Table 1,, based on all raw data, clarifies that most of the labs
reported a “<-“< ‒ value”.
Table 1 — Summary of the conclusions of the validation per compound and per matrix
a
Abbr. Analyte Formu IUPAC name CAS- RivC Sed Mar Wa Soi Slu
b
la RN lay Sed ste l dg
e
2,2,3,3,4,4,4-
Perfluorobut C4HF7 375– Yes Ye
PFBA Heptafluorobutanoic   Yes Yes
anoic acid O2 22–4 (7) s
acid
2,2,3,3,4,4,5,5,5-
Perfluorope C5HF9 2706– Con Ye
PFPeA Nonafluoropentanoic - No Yes Yes
ntanoic acid O2 90–3 s < s
acid
2,2,3,3,4,4,5,5,6,6,6-
Perfluorohe C6HF1 307– Con Ye
PFHxA Undecafluorohexanoic Yes Yes Yes Yes
xanoic acid 1O2 24–4 s < s
acid
2,2,3,3,4,4,5,5,6,6,7,7,7-
Perfluorohe C7HF1 375– Con Ye
PFHpA Tridecafluoroheptanoic Yes Yes Yes Yes
ptanoic acid 3O2 85–9 s < s
acid
2,2,3,3,4,4,5,5,6,6,7,7,8,
Perfluorooct C8HF1 8,8- 335– Ye
PFOA Yes Yes Yes Yes Yes
anoic acid 5O2 Pentadecafluorooctanoi 67–1 s
c acid
Perfluorooct
PFOA C8HF1
anoic acid
branched 5O2
branched
Perfluorono C9HF1 375– Con Ye
2,2,3,3,4,4,5,5,6,6,7,7,8,
PFNA Yes Yes Yes Yes
nanoic acid 7O2 95–1 s < s
8,9,9,9-
ISO/DISFDIS 25652:20252026(en)
a
Abbr. Analyte Formu IUPAC name CAS- RivC Sed Mar Wa Soi Slu
b
la RN lay Sed ste l dg
e
Heptadecafluoro-
nonanoic acid
Perfluorono
PFNA C9HF1
nanoic acid
branched 7O2
branched
2,2,3,3,4,4,5,5,6,6,7,7,8,
Perfluorodec C10HF 8,9,9,10,10,10- 335– Con Ye
PFDA Yes Yes Yes Yes
anoic acid 19O2 Nonadecafluorodecanoi 76–2 s < s
c acid
2,2,3,3,4,4,5,5,6,6,7,7,8,
Perfluoroun
C11HF 8,9,9,10,10,11,11,11- 2058– Con Ye
PFUnDA decanoic Yes Yes Yes Yes
21O2 Henicosafluoroundecan 94–8 s < s
acid
oic acid
2,2,3,3,4,4,5,5,6,6,7,7,8,
Perfluorodo 8,9,9,10,10,11,11,12,12,
C12HF 307– Con Ye
PFDoDA decanoic 12- Yes Yes Yes Yes
23O2 55–1 s < s
acid Tricosafluorododecanoi
c acid
2,2,3,3,4,4,5,5,6,6,7,7,8,
Perfluorotri 8,9,9,10,10,11,11,12,12
C13HF 72629 Con Ye
PFTrDA decanoic ,13,13,13- Yes Yes Yes No
25O2 –94–8 s < s
acid Pentacosafluorotrideca
noic acid
2,2,3,3,4,4,5,5,6,6,7,7,8,
Perfluorotet 8,9,9,10,10,11,11,12,12
C14HF 376– Cons Con Ye
PFTeDA ra-decanoic ,13,13,14,14,14 - Yes Yes Yes
27O2 06–7 < s < s
acid Heptacosafluorotetra -
decanoic acid
2,2,3,3,4,4,5,5,6,6,7,7,8,
8,9,9,10,10,11,11,12,12
Perfluorohe
C16HF ,13,13,14,14,15,15,16,1 67905 Cons Con Con Ye
PFHxDA xa-decanoic Yes Yes
31O2 6,16,16 - - –19–5 < s < s < s
acid
Hentriacontafluorohex
a -decanoic acid
2,2,3,3,4,4,5,5,6,6,7,7,8,
8,9,9,10,10,11,11,12,12
Perfluorocta ,13,13,14,14,15,15,16,1
C18HF 16517 Cons Con Con Yes Ye Yes
PFODA -decanoic 61
35O2 –11–6 < s < s < (6) s (7)
acid 6,17,17,18,18,18 -
Pentatriacontafluoro -
octadecanoic acid
Perfluorobut 1,1,2,2,3,3,4,4,4-
C4HF9 375– Cons Con Ye
PFBS ane-sulfonic Nonafluorobutane-1- Yes Yes Yes
O3S 73–5 < s < s
acid sulfonic acid
Perfluorope 1,1,2,2,3,3,4,4,5,5,5-
C5HF1 2706– Cons Con Con Ye
PFPeS ntane- Undecafluoropentane- Yes Yes
1O3S 91–4 < s < s < s
sulfonic acid 1-sulfonic acid
ISO/DISFDIS 25652:20252026(en)
a
Abbr. Analyte Formu IUPAC name CAS- RivC Sed Mar Wa Soi Slu
b
la RN lay Sed ste l dg
e
Perfluorohe 1,1,2,2,3,3,4,4,5,5,6,6,6-
C6HF1 355– Con Yes Ye
PFHxS xane- Tridecafluorohexane-1- Yes Yes Yes
3O3S 46–4 s < (6) s
sulfonic acid sulfonic acid
Perfluorohe
xane-
PFHxS C6HF1
sulfonic
branched 3O3S
acid branche
d
1,1,2,2,3,3,4,4,5,5,6,6,7,
Perfluorohe 7,
C7HF1 375– Con Con Ye
PFHpS ptane- 7- Yes Yes Yes
5O3S 92–8 s < s < s
sulfonic acid Pentadecafluoroheptan
e-1-sulfonic acid
1,1,2,2,3,3,4,4,5,5,6,6,7,
Perfluorooct 7,
C8HF1 1763– Ye
PFOS ane-sulfonic 8,8,8- Yes Yes Yes Yes Yes
7O3S 23–1 s
acid Heptadecafluorooctane
-1-sulfonic acid
Perfluorooct
PFOS ane-sulfonic C8HF1
branched acid branche 7O3S
d
1,1,2,2,3,3,4,4,5,5,6,6,7,
Perfluorono
C9HF1 7,8,8,9,9,9- 68259 Cons Con Con Ye
PFNS nane- Yes Yes
9O3S Nonadecafluoro- –12–1 < s < s < s
sulfonic acid
nonane-1-sulfonic acid
1,1,2,2,3,3,4,4,5,5,6,6,7,
Perfluorodec
C10HF 7,8,8,9,9,10,10,10- 335– Cons Con Con Ye
PFDS ane-sulfonic Yes Yes
21O3S Henicosafluorodecane- 77–3 < s < s < s
acid
1-sulfonic acid
1,1,2,2,3,3,4,4,5,5,6,6,7,
Perfluoroun 7, 74978
C11HF Cons Con Con
PFUnDS decane- 8,8,9,9,10,10,11,11,11- 6–16– Yes No Yes
23O3S < s < s <
sulfonic acid Tricosafluoroundecane 1
-1-sulfonic acid
C12HF 1,1,2,2,3,3,4,4,5,5,6,6,7,
Perfluorodo 25O3S 7,8,8,9,9,10,10,11,11,12
79780 Cons Con Con
PFDoDS decane- C12HF ,12,12- Yes No Yes
–39–5 < s < s <
sulfonic acid 2 Pentacosafluorodo-
5O3S decane-1-sulfonic acid
1,1,2,2,3,3,4,4,5,5,6,6,7,
Perfluorotri 7,8,8,9,9,10,10,11,11,12 79156
C13HF Cons Con Con
PFTrDS decane- ,12,13,13,13 - 3–89– No No No
27O3S < s < s <
sulfonic acid Heptacosafluorodo- 8
decane -1-sulfonic acid
4:2
3,3,4,4,5,5,6,6,6- 75712
Fluorotelom C6H5F Cons Con Con Ye
4:2 FTS Nonafluorohexane-1- 4–72– Yes Yes
er sulfonic 9O3S < s < s < s
sulfonic acid 4
acid
ISO/DISFDIS 25652:20252026(en)
a
Abbr. Analyte Formu IUPAC name CAS- RivC Sed Mar Wa Soi Slu
b
la RN lay Sed ste l dg
e
C8H5F
6:2
13O3S 3,3,4,4,5,5,6,6,7,7,8,8,8-
Fluorotelom 27619 Cons Con Ye
6:2 FTS C8H5F Tridecafluorooctane-1- Yes No Yes
er sulfonic –97–2 < s < s
1 sulfonic acid
acid
3O3S
C16H9
6:2
F26O4 bis(3,3,4,4,5,5,6,6,7,7,8,
fluorotelome 57677 Yes
6:2 diPAP PC16H 8,8-tridecafluorooctyl)
r phosphate –95–9 (4)
9F hydrogen phosphate
diester
26O4P
3,3,4,4,5,5,6,6,7,7,8,8,9,
C18H9
6:2 8:2 9,10,10,10-
F30O4 94391
fluorotelome heptadecafluorodecyl Cons Con Yes
6:2 8:2 diPAP PC18H 3–15–
r phosphate 3,3,4,4,5,5,6,6,7,7,8,8,8- < s < (4)
9F 3
diester tridecafluorooctyl
30O4P
hydrogen phosphate
C10H5
8:2 3,3,4,4,5,5,6,6,7,7,8,8,9,
F17O3
Fluorotelom 9,10,10,10- 39108 Cons Con Ye
8:2 FTS SC10H Yes Yes Yes
er sulfonic Heptadecafluorodecane –34–4 < s < s
5F
acid -1-sulfonic acid
17O3S
C12H5
10:2 3,3,4,4,5,5,6,6,7,7,8,8,9,
F21O3 12022
Fluorotelom 9,10,10,11,11,12,12,12- Cons Con Ye
10:2 FTS SC12H 6–60– Yes Yes No
er-sulfonic Henicosafluorododecan < s < s
5F 0
acid e-1-sulfonic acid
21O3S
8:2
C10H2
Fluorotelom 3,4,4,5,5,6,6,7,7,8,8,9,9,
F16O2
er 10,10,10- 70887 Cons Con Con Yes Ye
8:2 FTUCA C10H2 Yes
unsaturated Hexadecafluorodec-2- –84–2 < s < s < (6) s
F
carboxylic enoic acid
16O2
acid
C20H9
8:2 Bis(3,3,4,4,5,5,6,6,7,7,8,
F34O4
Perfluoroalk 8,9,9,10,10,10- 678– Cons Con
8:2 diPAP PC20H Yes Yes No Yes
yl phosphate heptadecafluorodecyl) 41–1 < s <
9F
diester hydrogen phosphate
34O4P
1,1,2,2,3,3,4,4,5,5,6,6,7,
Perfluorooct C8H2F
7,8,8,8- 754– Ye
PFOSA ane- 17NO2 Yes Yes Yes Yes Yes
Heptadecafluoro-1- 91–6 s
sulfonamide S
octanesulfonamide
Perfluorooct
C8H2F
PFOSA ane-
17NO2
branched sulfonamide
S
branched
N- 1,1,2,2,3,3,4,4,5,5,6,6,7,
methylperfl C9H4F 7,8,8,8- Ye
31506 Cons Yes Con Yes
MePFOSA uoro- 17NO2 Heptadecafluoro-N- s Yes
–32–8 < (4) s < (7)
octanesulfon S methyl-1- (7)
amide octanesulfonamide
ISO/DISFDIS 25652:20252026(en)
a
Abbr. Analyte Formu IUPAC name CAS- RivC Sed Mar Wa Soi Slu
b
la RN lay Sed ste l dg
e
N-
methylperfl
C9H4F
MePFOSA uoro-
17NO2
branched octanesulfon
S
amide
branched
N- 2-
methylperfl [1,1,2,2,3,3,4,4,5,5,6,6,7
C11H6
uoro- ,7,8,8,8- 2355– Cons Ye
MePFOSAA F17NO Yes Yes Yes Yes
octanesulfon Heptadecafluorooctyl- 31–9 < s
4S
amidoacetic sulfonyl(methyl)amino
acid ]acetic acid
N-
methylperfl
uoro- C11H6
MePFOSAA
octanesulfon F17NO
branched
amidoacetic 4S
acid
branched
N- N-Ethyl-
ethylperfluo C10H6 1,1,2,2,3,3,4,4,5,5,6,6,7, Ye
4151– Cons Yes Con Yes Yes
EtPFOSA ro- F17NO 7,8,8,8- s
50–2 < (7) s < (6) (7)
octanesulfon 2S heptadecafluorooctane- (7)
amide 1-sulfonamide
N-
ethylperfluo
C10H6
EtPFOSA ro-
F17NO
branched octanesulfon
2S
amide
branched
2-
N-
[Ethyl(1,1,2,2,3,3,4,4,5,
ethylperfluo C12H8
5,6,6,7,7,8,8,8- 2991– Ye
EtPFOSAA rooctane- F17NO Yes Yes Yes Yes Yes
heptadecafluoro- 50–6 s
sulfonamido 4S
octylsulfonyl)amino]ac
acetic acid
etic acid
N-
ethylperfluo
C12H8
EtPFOSAA rooctane-
F17NO
branched sulfonamido
4S
acetic acid
branched
N-
N-Methyl-
methylperfl Ye
C5H4F 1,1,2,2,3,3,4,4,4- 68298 Cons Con Con Yes Yes
MePFBSA uoro- s
9NO2S nonafluorobutane-1- –12–4 < s < s < (5) (6)
butanesulfo (6)
sulfonamide
namide
N-
15938 Ye
2-
C7H6F Cons Con Con
methylperfl
MePFBSAA 1–10– No s Yes
[Methyl(1,1,2,2,3,3,4,4,
9NO4S < s < s <
uoro-
9 (6)
4-
butanesulfo
ISO/DISFDIS 25652:20252026(en)
a
Abbr. Analyte Formu IUPAC name CAS- RivC Sed Mar Wa Soi Slu
b
la RN lay Sed ste l dg
e
namidoaceti nonafluorobutylsulfony
c acid l)amino]acetic acid
Nonafluoro- 2,2-difluoro-2-[1,1,2,2-
3,6- C5HF9 tetrafluoro-2-(-
NFDHpA 2–58–
dioxaheptan O4 (trifluoromethoxy)etho
oic acid xy]acetic acid
Perfluorobut 1,1,2,2,3,3,4,4,5,5,6,6,6-
C4H2F 30334 Cons Con Con Ye
PFBSA ane- Nonafluoro-1- No Yes
9NO2S –69–1 < s < s < s
sufonamide butanesulfonamide
Perfluoro-3- 2,2,3,3-tetrafluoro-3- Ye
C4HF7 377– Yes
PFMPA methoxypro (trifluoromethoxy)prop    s
O3 73–1 (3)
panoic acid anoic acid (3)
2,2,3-Trifluoro-3-
4,8-Dioxa-
[1,1,2,2,3,3-hexafluoro- 91900
3H- C7H2F Cons Con Con Ye
DONA 3-(- 5–14– Yes Yes
perfluorono 12O4 < s < s < s
(trifluoromethoxy)prop 4
nanoic acid
oxy]propanoic acid
7H- 2,2,3,3,4,4,5,5,6,6,7,7- Ye
C7H2F 1546– Cons Con Con
HPFHpA Perfluorohe Dodecafluoroheptanoic Yes s Yes
12O2 95–8 < s < s <
ptanoic acid acid (7)
Perfluoro-3– 2,2,3,4,4,5,5,6,6,7,8,8,8-
17215 Ye
7- C10HF Tridecafluoro-3,7- Cons Con Con Yes
P37DMOA 5–07– s Yes
dimethyloct 19O2 bis(trifluoromethyl)oct < s < s < (7)
6 (7)
anoic acid anoic acid
Perfluorohe C6H2F 1,1,2,2,3,3,4,4,5,5,6,6,6- Ye
41997 Cons Con Con Yes Yes
PFHxSA xane-sulfon- 13NO2 tridecafluorohexane-1- s
–13–1 < s < s < (7) (5)
amide S sulfonamide (6)
2,2,3,3,4,4-hexafluoro-
Perfluoro-4- 86309
C5HF9 4-(-
PFMBA methoxybut 0–89–
O3 (trifluoromethoxy)buta
anoic acid 5
noic acid
9- 2-(6-Chloro-
Chlorohexad 1,1,2,2,3,3,4,4,5,5,6,6-
C8HCl 75642
ecafluoro-3- dodecafluorohexoxy)- Cons Con Con Ye
9Cl-PF3ONS F16O4 6-58- Yes Yes
oxanonane- 1,1,2,2- < s < s < s
S 1
1-sulfonic tetrafluoroethanesulfo
acid nic acid
2H,2H,3H,3 4,4,5,5,6,6,7,7,8,8,9,9,1
H-perfluoro C11H5 0,10,11,11,11- 34598 Cons Con Yes
4H-PFUnDA Yes No Yes
undecanoic F17O2 Heptadecafluoroundec –33–9 < s < (6)
acid anoic acid
perfluoro-4- 1,2,2,3,3,4,5,5,6,6-
Ye
ethylcyclohe C8HF1 decafluoro-4-(1,1,2,2,2- 646– Cons Con Con Yes
4-PFECHS  s
xane 5O3S pentafluoroethyl)cyclo 83–3 < s < s < (6)
(7)
sulfonic acid hexane-1-sulfonic acid
2,3,3,3-Tetrafluoro-2-
Perfluoro-2–
C6HF1 (1,1,2,2,3,3,3- 13252 Cons Con Con Ye
HFPO-DA propoxypro Yes Yes
1O3 heptafluoropropoxy)- –13–6 < s < s < s
panoic acid
propanoic acid
ISO/DISFDIS 25652:20252026(en)
a
Abbr. Analyte Formu IUPAC name CAS- RivC Sed Mar Wa Soi Slu
b
la RN lay Sed ste l dg
e
a IUPAC      : International Union of Pure and Applied Chemistry
b CAS-RN    : Chemical Abstract Services Registry Number
1 The branched isomers mentioned in this table are examples, other branched isomers do exist.

Further explanation:
RivClay: River Clay
river clay
Sed: Sediment
sediment
MarSed: Marine Sediment
marine sediment
Yes        : criterion of CVR < 50 % was met with 8 or more laboratories
Yes(n): )     criterion of CVR < 50 % was met with n laboratories
No         : criterion was not met with 8 or more laboratories
Cons <     : most of the results consistently < - ‒ value
5 Interferences
5.1 General
In particular, process interferences can be caused by contact of the sample with polytetrafluoroethylene
(PTFE) materials. To avoid raised blank values, materials of glass, steel, polyether ether ketone (PEEK),
polypropylene (PP) or high density polyethylene (HDPE) should preferably be used for sampling, extraction
and analysis.
5.2 Interferences in the extraction and cleaning and processing of extracts
Efforts should be taken to minimize background levels in method blank materials such that the method blank
is maximum half of the reporting limit (8.8().). Low molecular residuals in fluoropolymer-containing materials
such as Viton (Fluorocarbonfluorocarbon rubber), PVDF (Polyvinylideenfluoridepolyvinylideenfluoride), etc.,
which are often used in LC equipment, can cause blank values, e.g. in the case of PFOA. Sampling vessels (7.1())
and sample vials (7.4()) shall be checked for possible background contamination before use.
5.3 Interferences in the HPLC-MS / /MS analysis
Either peak tailing, peak fronting or broadened peaks or a combination of one of these are indicative of
interferences in chromatography. Sample matrix components can affect the ionization of the target
substances. This can result in suppression or enhancement of the ionization. Such matrix interferences can be
detected and corrected by using authentic isotopically labelled internal standards. Substances with similar
retention times that can produce ions with similar mass to charge ratios (m/z) to those produced by the target
analytes can interfere with the determination. These interferences can lead to incompletely resolved signals
and/or additional signals in the mass chromatograms of target substances. Depending on their levels in the
sample, such substances can affect the accuracy and precision of the results. As long as the peak of interest can
be separately integrated from interferences, it may be used.
Typical contamination sources in the LC system include vacuum degassers, frits and tubes as well as pump
head seals. In the case of such interferences, degassing of the eluents, for example, can be carried out using
helium instead of vacuum degassers. Fluoropolymer frits and tubes shall be replaced by frits and tubes made
of stainless steel or PEEK. If available, pump head seals made of PE shall be used.
ISO/DISFDIS 25652:20252026(en)
A delay column supports avoiding background contamination from within the instrument (7.13().).
6 Reagents
Always use certified or analytical grade reagents whenever possible. Store the reagents in glass or
polypropylene bottles (7.10) fitted with a metal or polypropylene lid. Avoid using lids containing
fluoropolymers and verify reagents are free from contaminants by taking regular blank measurements, see
the method blank procedure (8.8.).
6.1 Ultrapure water, H O, deionized.
6.2 Acetonitrile, CH CN.
6.3 Methanol, CH OH.
OH, can be used.
6.4 Sodium hydroxide, NaOH, alternatively ammonium hydroxide, NH
6.5 Acetic acid, CH COOH, > 96 % (mass fraction).
6.6 Ammonium formate, NH HCO , alternatively ammonium acetate NH CO CH or ammonium carbonate
4 2 4 2 3
(NH ) CO can be used.
4 2 3
6.7 Extraction solvent, acetonitrile:methanol (1:1) with 0,05 mol/l sodium hydroxide.
Weigh e.g. 2 g sodium hydroxide (6.4()) into a mixture of 500 ml acetonitrile (6.2()) and 500 ml methanol
(6.3().).
Other solvents with similar chemical properties and other concentrations of sodium hydroxide than those
described here may be used, provided that comparability with the operating procedure of the present
standard is demonstrated.
6.8 Conditioning fluid, acetonitrile:methanol:water (1:1:1).
Mix e.g. 250 ml of water (6.1()) with 250 ml of acetonitrile (6.2()) and 250 ml of methanol (6.3().).
6.9 Elution liquid, acetonitrile:methanol (1:1) with 0.,05 mol/l acetic acid.
Add e.g. 0,3 ml acetic acid (6.5()) to a mixture of 50 ml acetonitrile (6.2()) and 50 ml methanol (6.3().).
6.10 Mobile phase, ammonium formate eluate solution with 5 % methanol.
Weigh e.g. 1,2 g of ammonium formate (6.6()) into a mixture of 38003 800 ml of water (6.1()) and 200 ml of
methanol (6.3().).
6.11 Reference standards.
Only use reference standards that consist of at least 95 % (mass fraction) of the linear isomer, for the
quantitative determination of the analytes (see Table 1).
NOTE Ampoules of individual compounds or mixtures thereof are commercially available.
6.12 Isotope labelled standards.
Isotope labelled standards are used for internal standard calibration. This allows correction for loss during
the analytical process or other changes in analytical conditions that can lead to bias.
ISO/DISFDIS 25652:20252026(en)
NOTE Ampoules of individual isotope labelled standards or mixtures thereof are commercially available.
6.13 Preparation of stockStock, intermediate and calibration solutions.
Calculate the concentration of all reference and calibration solutions on the basis of the dissolved anion
amount (neutral compound). All solutions are stored in the dark at 5 ± ± 3 °C. The solutions have a shelf life
of at least one year. The solutions are brought to room temperature before use. For some compounds
sonication or vortex, or both, is required.
6.13.1 Stock solutions of reference standards.
Prepare stock solutions of the reference standards (6.11()) in acetonitrile (6.2()) or methanol (6.3().).
6.13.2 Stock solutions from isotope labelled standards.
Prepare stock solutions of the isotope-labelled standards solutions (6.12()) in acetonitrile (6.2()) or methanol
(6.3().).
NOTE 13C HFPO-DA is not stable in acetonitrile.
6.13.3 Stock solutions of reference standards for QC for verification of the calibration curve.
Prepare stock solutions of independent reference standards (6.11()) in acetonitrile (6.2()) or methanol
(6.3().). Independent reference standards are preferably obtained from different suppliers. A minimum of one
third of the analytes in the stock solutions of reference standards (6.13.1()) should be present in the
calibration verification solution. Each calibration verification solution should, if relevant for the compounds
to be analysed, contain representative compounds for at least the following groups:
— Perfluoratedperfluorated carboxylic acids: PFBA, PFHxA, PFOA, PFDA, PFTeDA, PFODA;
— Perfluoratedperfluorated sulfonic acids: PFBS, PFHxS, PFOS, PFDS, PFDoDS;
— Fluorotelomersfluorotelomers: 4:2 FTS, 10:2 FTS;
— Perfluoroperfluoro-sulfonamides: PFBSA;
— Perfluoroperfluoro-sulfonamide acetic acids: EtPFOSAA, MePFOSAA;
— Variousvarious: DONA, 4-PFECHS, HFPO-DA, 8:2 diPAP.
Preferably use standards from a different supplier for the calibration verification solution or at least different
mixtures from the same supplier (if available).
NOTE HFPO-DA is not stable in acetonitrile.
6.13.4 Intermediate solution of reference standards.
Prepare an intermediate solution of the stock solutions of reference standards (6.13.1()) in methanol (6.3())
or acetonitrile (6.2) (the same as used for the stock solution) at a concentration of e.g. 0,2 µg / /ml.
6.13.5 Intermediate solution of isotope-labelled standards.
Prepare an intermediate solution of the stock solutions of isotope-labelled standards (6.13.2()) in methanol
(6.3()) or acetonitrile (6.2) (the same as used for the stock solution) with a concentration of e.g. 0,2 µg / /ml.
6.13.6 Intermediate solution of reference standards for QC verification of the calibration curve.
ISO/DISFDIS 25652:20252026(en)
Prepare an intermediate solution of the stock solutions of independent reference standards for QC verification
of the calibration curve (6.13.3()) in methanol (6.3()) or acetonitrile (6.2) (the same as used for the stock
solution) with a concentration of e.g. 0,2 µg / ml.
6.13.7 Calibration solutions from reference standards.
This is a series of multi-component calibration solutions (at least five different solutions) in increasing
concentration prepared in methanol (6.3()) or acetonitrile (6.2) (the same as used for the stock solution) from
the intermediate solution of reference standards (6.13.4()) with a concentration range of, as an example,
0.,02 ng / /ml to 20 ng / /ml. A fixed amount of the isotope-labelled standards (6.13.5()) intermediate
solutions are added to each calibration solution.
NOTE Instead of adding the isotope labelled standards to the calibration solutions, injection can also be performed
by the instrument.
6.13.8 Spike solution isotope-labelled standards.
()) or
Prepare a spike solution of the intermediate isotope-labelled standards (6.13.5()) in methanol (6.3
acetonitrile (6.2) (the same as used for the stock solution) with a concentration of e.g. 0,02 µg/ml. The
concentration level should be at least three times the corresponding level of the limit of quantification.
6.13.9 Solutions of independent standards for verification of the calibration curve.
Prepare two solutions in methanol (6.3()) or acetonitrile (6.2) (the same as used for the stock solution) from
the intermediate solution of independent standards for verification of the calibration curve (6.13.6()) with a
concentration preferably in the beginning and end of the calibration range.
6.14 Purification columns; disposable adsorption material.
— SPE (Solid Phase Extractionsolid phase extraction) adsorption material: Activatedactivated carbon, such
2)
as ENVI-Carb .
— Other adsorption materials may be used provided equivalent results are obtained. Good results are
obtained using 250 mg/ 6 ml tubes.
6.15 Nitrogen gas, N .
6.16 Silver sand.
6.17 Neutralization solution.
Weigh e.g. 3,8 g ammonium acetate (6.6()) in 100 ml water (6.1().).
7 Equipment
All equipment and utensils that come into contact with the sample or extract shall be free from PFAS
contaminants analysed. If a background signal of PFAS is observed, the equipment and utensils used should
be cleaned with water (6.1()) and methanol (6.3().). All equipment shall be calibrated or checked according to
official standards or proprietary internal procedures.
7.1 Sample containers with screw cap, free from background signal.

2)
ENVI-Carb is an example of a suitable product available commercially. This information is given for the convenience of
users of this document and does not constitute an endorsement by ISO of these products.this product.

ISO/DISFDIS 25652:20252026(en)
Sample containers made of glass, polypropylene, PET or high-density polyethylene (HDPE) or stainless steel.
7.2 Balance, with a resolution of at least 1 % of the weighed amount.
7.3 Syringes.
7.4 Test tubes, sampling vials of appropriate volume, e.g. made of Polypropylenepolypropylene.
7.5 Pasteur pipettes.
7.6 Pipettes of appropriate volume.
7.7 Evaporation block.
7.8 Shaking device, with horizontal movement (200 to 300 strokes per min).
7.9 Centrifuge.
7.10 Polypropylene containers.
7.11 Liquid chromatograph with gradient set-up with mass spectrometer.
Mass spectrometric detector (MS/MS), preferably tandem mass spectrometer with electrospray ionization
(ESI).
NOTE For the procedure described in this standard, other MS techniques can be used as well, e.g. time-of-flight mass
spectrometry (TOF/MS), provided the identification of the analytes has been verified and documented for the respective
applications.
7.12 “Reversed phase” HPLC column, C18 or equivalent.
7.13 Delay column.
Background contamination from the instrument can be controlled by using a delay column. A delay column is
attached between the solvent mixer and the injection valve to chromatographically separate these background
contaminants, originating from the instrument or mobile phases, or both, from the target analytes.
7.14 HPLC vial, e.g. a 2 ml Polypropylenepolypropylene vial, with a fluorine screw cap.
8 Sample storage, extraction and analytical procedure
8.1 Sample storage
Samples shall be analysed within 28 days. If necessary, sludge samples should be stored according to
ISO 5667-15. Dried samples can be stored at room temperature up to one month. Soil samples should be stored
according to ISO 18512.
8.2 Sample pretreatment
The sample shall be dried. Drying can be performed e.g. by freeze drying (preferred for sewage sludge) or
drying at a maximum of 40 °C. Chemical drying (with sodium sulfate) is also a possibility. It is recommended
that a field moist soil sample or a sludge sample be pre-treated following standards such as EN 16179, and
that waste samples be treated according to standards like EN 15002 or any other suitable standard.
Drying of the (partial) sample is permitted up to a maximum of 40 °C to minimize loss of volatile PFAS
compounds.
ISO/DISFDIS 25652:20252026(en)
8.3 Extraction
The different steps for the procedure described here are an example and are summarized in Annex A,
Figure A.1Figure A.1.
Remove the spike solution of the isotope internal standard solution (6.13.8()) from the refrigerator and allow
it to reach room temperature.
At least one method blank is prepared for each series.
Depending on the grinding fineness, 1 g to 10 g of dried sample is weighed into a polypropylene container
(7.10()) or a suitable glass container. To all samples e.g. 100 µl isotopically labelled spike solution (6.13.8) is
() added. All samples are shaken briefly by hand to mix the added solution with the sample.
An amount of acetonitrile (6.2()) or methanol (6.3()) or a mixture (6.7()) of acetonitrile:methanol (1:1) is used
as extraction solvent. Add 0,05 mol/l sodium hydroxide or ammonium hydroxide (6.4() are added) to all
samples in order to getobtain a liquid-solid ratio from at least 2 to 4 (e.g. 20 ml to 5 g).
NOTE The use of only acetonitrile is not possible if HFPO-DA has to be analysed, as this compound is not stable in
acetonitrile.
Other solvents with similar chemical properties and other concentrations of sodium hydroxide than those
described here may be used, provided that comparability with the operating procedure of the present
standard is demonstrated.
The samples are placed on the shaker (7.8()) and shaken for a minimum of 60 minutes. Instead of shaking,
ultrasonication (at a maximum temperature of 55 ˚C °C) may be applied. After extraction, the samples are
placed in the centrifuge (7.9()) to remove particles. Alternatively, the sample can be left in the refrigerator for
sedimentation for at least 3 hours.
If no purification step (see 8.4)) is applied, add 100 µl ammonium acetate solution (6.17()) to 900 µl extract.
8.4 Purification of the ex
...


PROJET FINAL
Norme
internationale
ISO/TC 190/SC 3
Sols, boues, déchets,
Secrétariat: DIN
sédiments — Analyse des
Début de vote:
substances perfluoroalkylées et
2026-10-12
polyfluoroalkylées (PFAS) par
Vote clos le:
chromatographie en phase liquide
2026-12-07
à haute performance (CLHP) et
spectrométrie de masse
Soil, sludge, waste, sediment — Analysis of perfluoroalkyl and
polyfluoroalkyl substances (PFAS) by high performance liquid
chromatography (HPLC) and mass spectrometry
LES DESTINATAIRES DU PRÉSENT PROJET SONT
INVITÉS À PRÉSENTER, AVEC LEURS OBSERVATIONS,
NOTIFICATION DES DROITS DE PROPRIÉTÉ DONT ILS
AURAIENT ÉVENTUELLEMENT CONNAISSANCE ET À
FOURNIR UNE DOCUMENTATION EXPLICATIVE.
OUTRE LE FAIT D’ÊTRE EXAMINÉS POUR
ÉTABLIR S’ILS SONT ACCEPTABLES À DES FINS
INDUSTRIELLES, TECHNOLOGIQUES ET COM-MERCIALES,
AINSI QUE DU POINT DE VUE DES UTILISATEURS, LES
PROJETS DE NORMES
TRAITEMENT PARALLÈLE ISO/CEN
INTERNATIONALES DOIVENT PARFOIS ÊTRE CONSIDÉRÉS
DU POINT DE VUE DE LEUR POSSI BILITÉ DE DEVENIR DES
NORMES POUVANT
SERVIR DE RÉFÉRENCE DANS LA RÉGLEMENTATION
NATIONALE.
Numéro de référence
PROJET FINAL
Norme
internationale
ISO/TC 190/SC 3
Sols, boues, déchets,
Secrétariat: DIN
sédiments — Analyse des
Début de vote:
substances perfluoroalkylées et
2026-10-12
polyfluoroalkylées (PFAS) par
Vote clos le:
chromatographie en phase liquide
2026-12-07
à haute performance (CLHP) et
spectrométrie de masse
Soil, sludge, waste, sediment — Analysis of perfluoroalkyl and
polyfluoroalkyl substances (PFAS) by high performance liquid
chromatography (HPLC) and mass spectrometry
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2026
LES DESTINATAIRES DU PRÉSENT PROJET SONT
Tous droits réservés.
INVITÉS À PRÉSENTER, AVEC LEURS OBSERVATIONS,
NOTIFICATION DES DROITS DE PROPRIÉTÉ DONT ILS
La présente publication de l’ISO est protégée par le droit d’auteur et demeure la propriété de l’ISO et/ou de ses concédants de
AURAIENT ÉVENTUELLEMENT CONNAISSANCE ET À
licence.
FOURNIR UNE DOCUMENTATION EXPLICATIVE.
Le contenu de la présente publication de l’ISO est fourni sous licence, et n’est pas vendu. Son utilisation est soumise aux conditions
OUTRE LE FAIT D’ÊTRE EXAMINÉS POUR
ÉTABLIR S’ILS SONT ACCEPTABLES À DES FINS
de licence applicables définies par l’ISO, un organisme membre de l’ISO, ou un distributeur tiers agréé.
INDUSTRIELLES, TECHNOLOGIQUES ET COM-MERCIALES,
Sous réserve des besoins liés à sa mise en œuvre ou d’une autorisation expresse prévue aux termes d’une licence distincte, aucune
AINSI QUE DU POINT DE VUE DES UTILISATEURS, LES
partie de la présente publication de l’ISO ne peut être reproduite, distribuée, modifiée, utilisée ou mise à disposition sous quelque PROJETS DE NORMES
TRAITEMENT PARALLÈLE ISO/CEN
INTERNATIONALES DOIVENT PARFOIS ÊTRE CONSIDÉRÉS
forme ou par quelque moyen que ce soit – électronique ou mécanique, y compris la photocopie, la numérisation, l’enregistrement
DU POINT DE VUE DE LEUR POSSI BILITÉ DE DEVENIR DES
ou la publication sur des plateformes numériques internes ou externes.
NORMES POUVANT
SERVIR DE RÉFÉRENCE DANS LA RÉGLEMENTATION
Toute utilisation hors du champ d’application des droits accordés est interdite et peut donner lieu à des poursuites judiciaires.
NATIONALE.
ISO copyright office
Case postale 401 • CH-1214 Vernier, Genève
Tél.: +41 22 749 01 11
E-mail: copyright@iso.org
Web: www.iso.org
Publié en Suisse
Numéro de référence
ii
Sommaire Page
Avant-propos .iv
Introduction .v
1 Domaine d’application . 1
2 Références normatives . 1
3 Termes et définitions . 1
4 Principe. 2
5 Interférences . 6
5.1 Généralités .6
5.2 Interférences liées à l’extraction, au nettoyage et au traitement des extraits .6
5.3 Interférences liées à l’analyse par CLHP-SM/SM .7
6 Réactifs . 7
7 Équipement . 10
8 Mode opératoire de stockage, d’extraction et d’analyse des échantillons .11
8.1 Stockage des échantillons .11
8.2 Prétraitement des échantillons .11
8.3 Extraction .11
8.4 Purification de l’extrait . 12
8.5 Analyse CLHP-SM/SM. 12
8.6 Séparation chromatographique . 15
8.7 Limite de détection instrumentale . 15
8.8 Blanc de méthode .16
9 Étalonnage .16
9.1 Généralités .16
9.2 Étalonnage de la méthode à l’aide d’un étalon interne .16
9.3 Calcul de la concentration fondé sur l’étalonnage avec des étalons internes .18
9.4 Traitement des échantillons en dehors de la plage d’étalonnage .18
10 Évaluation .18
10.1 Identification .18
10.2 Validité de l’étalonnage .19
10.3 Quantification des isomères ramifiés .19
10.4 Récupération des étalons marqués par un isotope .19
11 Expression des résultats .20
12 Rapport d’essai .20
Annexe A (informative) Organigramme .21
Annexe B (informative) Exemples de chromatogrammes .22
Annexe C (informative) Exemples de séparation chromatographique de PFAS linéaire et
ramifiés .25
Annexe D (informative) Résultats de validation .28
Bibliographie .44

iii
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération mondiale d’organismes nationaux
de normalisation (comités membres de l’ISO). L’élaboration des Normes internationales est en général
confiée aux comités techniques de l’ISO. Chaque comité membre intéressé par une étude a le droit de faire
partie du comité technique créé à cet effet. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec l’ISO participent également aux travaux. L’ISO collabore étroitement avec
la Commission électrotechnique internationale (IEC) en ce qui concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier de prendre note des différents
critères d’approbation requis pour les différents types de documents ISO. Le présent document
a été rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2
(voir www.iso.org/directives).
L’ISO attire l’attention sur le fait que la mise en application du présent document peut entraîner l’utilisation
d’un ou de plusieurs brevets. L’ISO ne prend pas position quant à la preuve, à la validité et à l’applicabilité
de tout droit de brevet revendiqué à cet égard. À la date de publication du présent document, l’ISO n’avait
pas reçu notification qu’un ou plusieurs brevets pouvaient être nécessaires à sa mise en application.
Toutefois, il y a lieu d’avertir les responsables de la mise en application du présent document que des
informations plus récentes sont susceptibles de figurer dans la base de données de brevets, disponible à
l’adresse www.iso.org/brevets. L’ISO ne saurait être tenue pour responsable de ne pas avoir identifié tout ou
partie de tels droits de brevet.
Les appellations commerciales éventuellement mentionnées dans le présent document sont données pour
information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer un engagement.
Pour une explication de la nature volontaire des normes, la signification des termes et expressions
spécifiques de l’ISO liés à l’évaluation de la conformité, ou pour toute information au sujet de l’adhésion de
l’ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles techniques au
commerce (OTC), voir www.iso.org/iso/fr/avant-propos.html.
Le présent document a été élaboré par le comité technique ISO/TC 190, Qualité du sol, sous-comité SC 3,
Méthodes chimiques et caractéristiques physiques, en collaboration avec le comité technique CEN/TC 444,
Caractérisation environnementale des matrices solides, du Comité européen de normalisation (CEN),
conformément à l’Accord de coopération technique entre l’ISO et le CEN (Accord de Vienne).
Il convient que l’utilisateur adresse tout retour d’information ou toute question concernant le présent
document à l’organisme national de normalisation de son pays. Une liste exhaustive desdits organismes se
trouve à l’adresse www.iso.org/fr/members.html.

iv
Introduction
Les substances perfluoroalkylées et polyfluoroalkylées (PFAS) constituent un vaste groupe d’hydrocarbures
fluorés (substances alkylées) d’origine industrielle. Les PFAS se composent d’une chaîne carbonée
totalement (per-) fluorée ou partiellement (poly-) fluorée. Elles ont une longueur de chaîne généralement
comprise entre 2 et 18 atomes de carbone. Les PFAS les plus connues sont le PFOS (acide perfluorooctane
1)
sulfonique) et le PFOA (acide perfluorooctanoïque) .
Depuis 2018, il est requis d’accorder une attention particulière aux résidus de PFAS dans le domaine de
la valorisation des sols. Compte tenu des risques potentiels de ce groupe de substances ou du manque
d’informations à leur sujet, les seuils réglementaires pour la valorisation des sols sont dans certains pays
relativement faibles, de l’ordre de quelques µg/kg. C’est la raison pour laquelle les analyses chimiques
sont souvent décisives pour une prise de décision concernant la valorisation des sols et la détermination
des possibilités d’utilisation des sols et des matériaux dragués générés dans le cadre de projets. C’est
précisément à cause de la dissémination des PFAS et des seuils réglementaires relativement stricts qu’il y a
un besoin général de disposer d’une méthode d’analyse validée avec une limite de rapportage démontrée et
une uniformité des méthodes d’analyse et du prétraitement associé.
Le besoin de validation et d’uniformité ne concerne pas seulement l’analyse chimique. La stratégie
d’échantillonnage et la méthode de réalisation du travail sur site déterminent également le résultat final.
À cette fin, diverses lignes directrices ont été et seront fournies dans d’autres contextes et des lignes
directrices d’évaluation et des protocoles ont été mis au point.
1) Les deux substances, PFOS et PFOA, se composent respectivement de huit et sept atomes de carbone totalement
fluorés, le PFOS ayant en plus un sulfonate comme “groupe fonctionnel” sur le dernier atome de carbone et le PFOA un
groupe carboxyle.
v
PROJET FINAL Norme internationale ISO/FDIS 25652:2026(fr)
Sols, boues, déchets, sédiments — Analyse des substances
perfluoroalkylées et polyfluoroalkylées (PFAS) par
chromatographie en phase liquide à haute performance
(CLHP) et spectrométrie de masse
AVERTISSEMENT — Il convient que les utilisateurs du présent document soient familiarisés avec
les pratiques courantes de laboratoire. Le présent document n’a pas pour but de traiter tous les
problèmes de sécurité qui sont, le cas échéant, liés à son utilisation. Il incombe à l’utilisateur d’établir
des pratiques appropriées en matière d’hygiène et de sécurité.
IMPORTANT — Les essais réalisés conformément au présent document doivent être exécutés par du
personnel ayant reçu une formation adéquate.
1 Domaine d’application
Le présent document spécifie une méthode de détermination quantitative de divers hydrocarbures
perfluorés et polyfluorés par chromatographie en phase liquide haute performance (CLHP) et spectrométrie
de masse dans les sols, boues, sédiments et déchets (voir le Tableau 1).
L’Annexe D fournit de plus amples informations concernant les limites de quantification (LOQ) pouvant être
atteintes avec ce mode opératoire.
La méthode peut être appliquée à l’analyse de substances perfluoroalkylées et polyfluoroalkylées (PFAS)
autres que celles spécifiées dans le domaine d’application, si la validité a été démontrée par des protocoles
de validation internes convenables, en particulier pour les composés volatils qui peuvent être perdus durant
la préparation.
Pour chaque composé cible, tous ses isomères, ramifiés et non ramifiés sont quantifiés en même temps.
Dans le cadre de cette méthode, la quantité de PFAS linéaire et ramifiés est quantifiée à partir du
coefficient de réponse du PFAS linéaire dans la solution d’étalonnage et de l’aire totale des PFAS linéaire et
ramifiés (l’Annexe C donne de plus amples explications).
Il est également possible de quantifier l’isomère linéaire séparément de la totalité des isomères ramifiés
et de calculer la somme des deux à condition que le pic de l’isomère linéaire soit bien séparé de ceux des
isomères ramifiés.
2 Références normatives
Le présent document ne contient aucune référence normative.
3 Termes et définitions
Pour les besoins du présent document, les termes et définitions suivants s’appliquent.
L’ISO et l’IEC tiennent à jour des bases de données terminologiques destinées à être utilisées en normalisation,
consultables aux adresses suivantes:
— ISO Online browsing platform: disponible à l’adresse https:// www .iso .org/ obp
— IEC Electropedia: disponible à l’adresse https:// www .electropedia .org/

3.1
substances perfluoroalkylées et polyfluoroalkylées
PFAS
composés organiques présentant une substitution de la plupart ou de la totalité des atomes d’hydrogène par
un fluor dans la structure de chaîne aliphatique
Note 1 à l'article: Le terme est utilisé au sens large pour désigner les substances perfluoroalkylées et polyfluoro-
alkylées (PFAS) mais aussi les composés perfluorés et polyfluorés.
[SOURCE: ISO 21675:2019, 3.1]
4 Principe
Les composés répertoriés dans le Tableau 1 sont extraits du matériau échantillon préparé et homogénéisé
dans du méthanol, de l’acétonitrile ou un mélange des deux à un pH basique après ajout des composés
PFAS marqués par un isotope. Les extraits sont purifiés si nécessaire, par exemple sur du charbon actif.
L’identification et la quantification sont effectuées par chromatographie en phase liquide haute performance
couplée à un détecteur sélectif de masse (CLHP-SM/SM). La teneur de chaque composé PFAS est calculée par
la méthode de l’étalon interne.
Pour bon nombre de substances auxquelles le présent document est applicable, une limite de
quantification (LOQ) comprise entre 0,01 µg/kg de matière sèche et 0,1 µg/kg de matière sèche peut être
atteinte. Voir également l’Annexe D.
Tous les composés du Tableau 1 ont été soumis à essai lors d’un essai interlaboratoires international mené
en Europe de décembre 2023 à avril 2024. Le Tableau 1 spécifie les composés pour lesquels le critère d’un
coefficient de variation de reproductibilité interlaboratoires (C ) de 50 % n’a pas été atteint. Voir l’Annexe D
V,R
pour plus de détails.
La validité du mode opératoire a été démontrée pour les échantillons de sols, de sédiments et de boues
et pour une sélection d’échantillons de déchets. Pour les types de déchets autres que ceux mentionnés
à l’Annexe D, le laboratoire doit valider l’adéquation du mode opératoire de la présente norme.
NOTE Pour de nombreux composés dans l’échantillon d’argile de rivière, l’échantillon de sédiments et l’échantillon
de sédiments marins, le Tableau 1 donne comme conclusion “Concor. <”, où l’Annexe D peut donner des résultats positifs.
L’Annexe D dans ce cas présente les résultats des quelques laboratoires ayant un résultat positif, où le Tableau 1, sur la
base de toutes les données brutes, précise que la plupart des laboratoires ont rapporté “valeur inférieure à”.
Tableau 1 — Récapitulatif des conclusions de la validation par composé et par matrice
a b
Abrévia- Analyte Formule Nom IUPAC N° CAS ArgRiv Séd SédMar Dé- Sol Boues
tion chets
Acide perfluorobu- Acide 2,2,3,3,4,4,4-
PFBA C4HF7O2 375–22–4 Oui (7) Oui Oui Oui
tanoïque heptafluorobutanoïque
Acide perfluoropen- Acide 2,2,3,3,4,4,5,5,5-
PFPeA C5HF9O2 2706–90–3 – Concor. < Non Oui Oui Oui
tanoïque nonafluoropentanoïque
Acide perfluoro- Acide 2,2,3,3,4,4,5,5,6,6,6-
PFHxA C6HF11O2 307–24–4 Oui Concor. < Oui Oui Oui Oui
hexanoïque undécafluorohexanoïque
a
IUPAC      International Union of Pure and Applied Chemistry
b
N° CAS    Chemical Abstracts Service Registry Number (Numéro de registre du Chemical Abstract Service [CAS])
Les isomères ramifiés mentionnés dans le présent tableau sont des exemples, d’autres isomères ramifiés existent.

ArgRiv    argile de rivière
Séd        sédiments
SédMar    sédiments marins
Oui        le critère de CVR < 50 % a été atteint par 8 laboratoires ou plus
Oui(n)      le critère de CVR < 50 % a été atteint par n laboratoires
Non        le critère n’a pas été atteint par 8 laboratoires ou plus
Concor. <     la plupart des résultats rapportés comme “valeur inférieure à” de manière concordante

TTaabblleeaau 1 u 1 ((ssuuiitte)e)
a b
Abrévia- Analyte Formule Nom IUPAC N° CAS ArgRiv Séd SédMar Dé- Sol Boues
tion chets
Acide perfluorohep- Acide 2,2,3,3,4,4,5,5,6,6,7,7,7-
PFHpA C7HF13O2 375–85–9 Oui Concor. < Oui Oui Oui Oui
tanoïque tridécafluoroheptanoïque
Acide 2,2,3,3,4,4,5,5,6,6,7,7,8,
Acide perfluoroocta-
PFOA C8HF15O2 8,8- 335–67–1 Oui Oui Oui Oui Oui Oui
noïque
pentadécafluorooctanoïque
PFOA Acide perfluoroocta-
C8HF15O2
ramifié noïque ramifié
Acide 2,2,3,3,4,4,5,5,6,6,7,7,8,
Acide perfluorono-
PFNA C9HF17O2 8,9,9,9- 375–95–1 Oui Concor. < Oui Oui Oui Oui
nanoïque
heptadécafluoro-nonanoïque
PFNA Acide perfluorono-
C9HF17O2
ramifié nanoïque ramifié
Acide 2,2,3,3,4,4,5,5,6,6,7,7,8,
Acide perfluorodé-
PFDA C10HF19O2 Acide 8,9,9,10,10,10- 335–76–2 Oui Concor. < Oui Oui Oui Oui
canoïque
nonadécafluorodécanoïque
Acide 2,2,3,3,4,4,5,5,6,6,7,7,8,
Acide perfluoroun-
PFUnDA C11HF21O2 8,9,9,10,10,11,11,11- 2058–94–8 Oui Concor. < Oui Oui Oui Oui
décanoïque
hénicosafluoroundécanoïque
Acide 2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,
Acide perfluorodo-
PFDoDA C12HF23O2 9,10,10,11,11,12,12,12- 307–55–1 Oui Concor. < Oui Oui Oui Oui
décanoïque
tricosafluorododécanoïque
Acide 2,2,3,3,4,4,5,5,6,6,7,7,8,
Acide perfluorotri- 8,9,9,10,10,11,11,12,12
PFTrDA C13HF25O2 72629–94–8 Oui Concor. < Oui Oui Oui Non
décanoïque ,13,13,13-
pentacosafluorotridécanoïque
Acide 2,2,3,3,4,4,5,5,6,6,7,7,8,
Acide perfluoroté- 8,9,9,10,10,11,11,12,12
PFTeDA C14HF27O2 376–06–7 Concor. < Concor. < Oui Oui Oui Oui
tra-décanoïque ,13,13,14,14,14-
heptacosafluorotétra-décanoïque
Acide 2,2,3,3,4,4,5,5,6,6,7,7,8,
8,9,9,10,10,11,11,12,12
Acide perfluoro- ,13,13,14,14,15,15,16,1
PFHxDA C16HF31O2 67905–19–5 Concor. < Concor. < Concor. < Oui Oui Oui
hexa-décanoïque 6,16-
hentriacontafluorohexa-déca-
noïque
Acide 2,2,3,3,4,4,5,5,6,6,7,7,8,
8,9,9,10,10,11,11,12,12
Acide perfluorocta- ,13,13,14,14,15,15,16,1 Oui Oui
PFODA C18HF35O2 16517–11–6 Concor. < Concor. < Concor. < Oui
décanoïque 6,17,17,18,18,18- (6) (7)
pentatriacontafluoro-octadéca-
noïque
1,1,2,2,3,3,4,4,4-
Acide perfluorobu-
PFBS C4HF9O3S nonafluorobutane-1- 375–73–5 Concor. < Concor. < Oui Oui Oui Oui
tane-sulfonique
sulfonique
Acide 1,1,2,2,3,3,4,4,5,5,5-
Acide perfluoropen-
PFPeS C5HF11O3S undécafluoropentane-1-sulfo- 2706–91–4 Concor. < Concor. < Concor. < Oui Oui Oui
tane-sulfonique
nique
Acide 1,1,2,2,3,3,4,4,5,5,6,6,6-
Acide perfluoro-
PFHxS C6HF13O3S tridécafluorohexane-1-sulfo- 355–46–4 Oui Concor. < Oui (6) Oui Oui Oui
hexane-sulfonique
nique
Acide perfluoro-
PFHxS
hexane-sulfonique C6HF13O3S
ramifié
ramifié
a
IUPAC      International Union of Pure and Applied Chemistry
b
N° CAS    Chemical Abstracts Service Registry Number (Numéro de registre du Chemical Abstract Service [CAS])
Les isomères ramifiés mentionnés dans le présent tableau sont des exemples, d’autres isomères ramifiés existent.

ArgRiv    argile de rivière
Séd        sédiments
SédMar    sédiments marins
Oui        le critère de CVR < 50 % a été atteint par 8 laboratoires ou plus
Oui(n)      le critère de CVR < 50 % a été atteint par n laboratoires
Non        le critère n’a pas été atteint par 8 laboratoires ou plus
Concor. <     la plupart des résultats rapportés comme “valeur inférieure à” de manière concordante

TTaabblleeaau 1 u 1 ((ssuuiitte)e)
a b
Abrévia- Analyte Formule Nom IUPAC N° CAS ArgRiv Séd SédMar Dé- Sol Boues
tion chets
Acide 1,1,2,2,3,3,4,4,5,5,6,6,7,7,
Acide perfluorohep- 7-
PFHpS C7HF15O3S 375–92–8 Oui Concor. < Concor. < Oui Oui Oui
tane-sulfonique pentadécafluoroheptane-1-sul-
fonique
Acide 1,1,2,2,3,3,4,4,5,5,6,6,7,7,
Acide perfluorooc- 8,8,8-
PFOS C8HF17O3S 1763–23–1 Oui Oui Oui Oui Oui Oui
tane-sulfonique heptadécafluorooctane-1-sul-
fonique
Acide perfluorooc-
PFOS
tane-sulfonique C8HF17O3S
ramifié
ramifié
Acide 1,1,2,2,3,3,4,4,5,5,6,6,7,
Acide perfluorono- 7,8,8,9,9,9-
PFNS C9HF19O3S 68259–12–1 Concor. < Concor. < Concor. < Oui Oui Oui
nane-sulfonique nonadécafluoro-nonane-1-sul-
fonique
Acide 1,1,2,2,3,3,4,4,5,5,6,6,7,
Acide perfluorodé- 7,8,8,9,9,10,10,10-
PFDS C10HF21O3S 335–77–3 Concor. < Concor. < Concor. < Oui Oui Oui
cane-sulfonique hénicosafluorodécane-1-sulfo-
nique
Acide 1,1,2,2,3,3,4,4,5,5,6,6,7,7,
Acide perfluoroun- 8,8,9,9,10,10,11,11,11- 749786–
PFUnDS C11HF23O3S Concor. < Concor. < Concor. < Oui Non Oui
décane-sulfonique tricosafluoroundécane-1-sulfo- 16–1
nique
Acide 1,1,2,2,3,3,4,4,5,5,6,6,7,
Acide perfluorodo- C12HF2 7,8,8,9,9,10,10,11,11,12,12,12-
PFDoDS 79780–39–5 Concor. < Concor. < Concor. < Oui Non Oui
décane-sulfonique 5O3S pentacosafluorododécane-1-sul-
fonique
Acide 1,1,2,2,3,3,4,4,5,5,6,6,7,
7,8,8,9,9,10,10,11,11,12,12,13,1
Acide perfluorotri- 791563–
PFTrDS C13HF27O3S 3,13 - Concor. < Concor. < Concor. < Non Non Non
décane-sulfonique 89–8
heptacosafluorododécane-1-sul-
fonique
4:2 Sulfonate de Acide 3,3,4,4,5,5,6,6,6- 757124–
4:2 FTS C6H5F9O3S Concor. < Concor. < Concor. < Oui Oui Oui
fluorotélomère nonafluorohexane-1-sulfonique 72–4
6:2 Sulfonate de C8H5F1 Acide 3,3,4,4,5,5,6,6,7,7,8,8,8-tri-
6:2 FTS 27619–97–2 Concor. < Concor. < Oui Non Oui Oui
fluorotélomère 3O3S décafluorooctane-1-sulfonique
6:2 diester de bis(3,3,4,4,5,5,6,6,7,7,8,
C16H9F Oui
6:2 diPAP phosphate de fluoro- 8,8-tridécafluorooctyl)-hydrogé- 57677–95–9
26O4P (4)
télomère nophosphate
3,3,4,4,5,5,6,6,7,7,8,8,9,
6:2 8:2 diester de 9,10,10,10-
6:2 8:2 C18H9F 943913–
phosphate de fluoro- heptadécafluorodécyl- Concor. < Concor. < Oui (4)
diPAP 30O4P 15–3
télomère 3,3,4,4,5,5,6,6,7,7,8,8,8-tridéca-
fluorooctyl-hydrogénophosphate
Acide 3,3,4,4,5,5,6,6,7,7,8,8,9,
8:2 Sulfonate de C10H5F 9,10,10,10-
8:2 FTS 39108–34–4 Concor. < Concor. < Oui Oui Oui Oui
fluorotélomère 17O3S heptadécafluorodécane-1-sul-
fonique
Acide 3,3,4,4,5,5,6,6,7,7,8,8,9,
10:2 Sulfonate de C12H5F 9,10,10,11,11,12,12,12- 120226–
10:2 FTS Concor. < Concor. < Oui Oui Oui Non
fluorotélomère 21O3S hénicosafluorododécane-1-sul- 60–0
fonique
8:2 Acide carboxy- Acide 3,4,4,5,5,6,6,7,7,8,8,9,9,10
C10H2F Oui
8:2 FTUCA lique insaturé de ,10,10- 70887–84–2 Concor. < Concor. < Concor. < Oui Oui
16O2 (6)
fluorotélomère hexadécafluorodéc-2-énoïque
a
IUPAC      International Union of Pure and Applied Chemistry
b
N° CAS    Chemical Abstracts Service Registry Number (Numéro de registre du Chemical Abstract Service [CAS])
Les isomères ramifiés mentionnés dans le présent tableau sont des exemples, d’autres isomères ramifiés existent.

ArgRiv    argile de rivière
Séd        sédiments
SédMar    sédiments marins
Oui        le critère de CVR < 50 % a été atteint par 8 laboratoires ou plus
Oui(n)      le critère de CVR < 50 % a été atteint par n laboratoires
Non        le critère n’a pas été atteint par 8 laboratoires ou plus
Concor. <     la plupart des résultats rapportés comme “valeur inférieure à” de manière concordante

TTaabblleeaau 1 u 1 ((ssuuiitte)e)
a b
Abrévia- Analyte Formule Nom IUPAC N° CAS ArgRiv Séd SédMar Dé- Sol Boues
tion chets
Bis(3,3,4,4,5,5,6,6,7,7,8,
8:2 Diester de
C20H9F 8,9,9,10,10,10-
8:2 diPAP phosphate de per- 678–41–1 Concor. < Concor. < Oui Oui Non Oui
34O4P heptadécafluorodécyl)-hydrogé-
fluoroalkyle
nophosphate
1,1,2,2,3,3,4,4,5,5,6,6,7,
Perfluorooctane- 7,8,8,8-
PFOSA C8H2F17NO2S 754–91–6 Oui Oui Oui Oui Oui Oui
sulfonamide Heptadécafluoro-1-octanesulfo-
namide
PFOSA Perfluorooctane-
C8H2F17NO2S
ramifié sulfonamide ramifié
1,1,2,2,3,3,4,4,5,5,6,6,7,
N-méthylperfluoro- 7,8,8,8-heptadécafluoro-N-mé- Oui Oui
MePFOSA C9H4F17NO2S 31506–32–8 Concor. < Oui (4) Concor. < Oui
octanesulfonamide thyl-1- (7) (7)
octanesulfonamide
N-méthylperfluoro-
MePFOSA
octanesulfonamide C9H4F17NO2S
ramifié
ramifié
Acide 2-[1,1,2,2,3,3,4,4,5,5,6,6,7
Acide N-méthylper-
,7,8,8,8-
MePFOSAA fluoro-octanesulfo- C11H6F17NO4S 2355–31–9 Concor. < Oui Oui Oui Oui Oui
heptadécafluorooctyl-
namidoacétique
sulfonyl(méthyl)amino]acétique
Acide N-méthylper-
MePFOSAA fluoro-octanesul-
C11H6F17NO4S
ramifié fonamidoacétique
ramifié
N-
N-éthylperfluoro- éthyl-1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8- Oui Oui Oui
EtPFOSA C10H6F17NO2S 4151–50–2 Concor. < Oui (7) Concor. <
octanesulfonamide heptadécafluorooctane-1-sulfo- (6) (7) (7)
namide
N-éthylperfluoro-
EtPFOSA
octanesulfonamide C10H6F17NO2S
ramifié
ramifié
Acide 2-[éthyl(1,1,2,2,3,3,4,4,5,5,
Acide N-éthylper-
6,6,7,7,8,8,8-
EtPFOSAA fluorooctane-sulfo- C12H8F17NO4S 2991–50–6 Oui Oui Oui Oui Oui Oui
heptadécafluoro-octylsulfonyl)
namidoacétique
amino]acétique
Acide N-éthylper-
EtPFOSAA fluorooctane-sul-
C12H8F17NO4S
ramifié fonamidoacétique
ramifié
N-méthylperfluoro- N-méthyl-1,1,2,2,3,3,4,4,4- Oui Oui Oui
MePFBSA C5H4F9NO2S 68298–12–4 Concor. < Concor. < Concor. <
butanesulfonamide nonafluorobutane-1-sulfonamide (5) (6) (6)
Acide N-méthylper- Acide 2-[méthyl(1,1,2,2,3,3,4,4,4-
159381– Oui
MePFBSAA fluoro-butanesulfo- C7H6F9NO4S nonafluorobutylsulfonyl)amino] Concor. < Concor. < Concor. < Non Oui
10–9 (6)
namidoacétique acétique
Acide 2,2-difluoro-2-[1,1,2,2-té-
Acide nonafluo-
trafluoro-2- 151772–
NFDHpA ro-3,6-dioxahepta- C5HF9O4
(trifluorométhoxy)éthoxy] 58–6
noïque
acétique
1,1,2,2,3,3,4,4,5,5,6,6,6-Nona-
Perfluorobutane-su-
PFBSA C4H2F9NO2S fluoro-1- 30334–69–1 Concor. < Concor. < Concor. < Non Oui Oui
fonamide
butanesulfonamide
Acide perfluoro- Acide 2,2,3,3-tétrafluoro-
Oui Oui
PFMPA 3-méthoxypropa- C4HF7O3 3-(trifluorométhoxy)propa- 377–73–1
(3) (3)
noïque noïque
a
IUPAC      International Union of Pure and Applied Chemistry
b
N° CAS    Chemical Abstracts Service Registry Number (Numéro de registre du Chemical Abstract Service [CAS])
Les isomères ramifiés mentionnés dans le présent tableau sont des exemples, d’autres isomères ramifiés existent.

ArgRiv    argile de rivière
Séd        sédiments
SédMar    sédiments marins
Oui        le critère de CVR < 50 % a été atteint par 8 laboratoires ou plus
Oui(n)      le critère de CVR < 50 % a été atteint par n laboratoires
Non        le critère n’a pas été atteint par 8 laboratoires ou plus
Concor. <     la plupart des résultats rapportés comme “valeur inférieure à” de manière concordante

TTaabblleeaau 1 u 1 ((ssuuiitte)e)
a b
Abrévia- Analyte Formule Nom IUPAC N° CAS ArgRiv Séd SédMar Dé- Sol Boues
tion chets
Acide 2,2,3-trifluoro-
Acide 4,8-dioxa-3H-
3-[1,1,2,2,3,3-hexafluoro-3- 919005–
DONA perfluoronona- C7H2F12O4 Concor. < Concor. < Concor. < Oui Oui Oui
(trifluorométhoxy)propoxy] 14–4
noïque
propanoïque
Acide 7H-perfluoro- Acide 2,2,3,3,4,4,5,5,6,6,7,7- Oui
HPFHpA C7H2F12O2 1546–95–8 Concor. < Concor. < Concor. < Oui Oui
heptanoïque dodécafluoroheptanoïque (7)
Acide perfluoro- Acide 2,2,3,4,4,5,5,6,6,7,8,8,8-tri-
172155– Oui Oui
P37DMOA 3–7-diméthylocta- C10HF19O2 décafluoro-3,7- Concor. < Concor. < Concor. < Oui
07–6 (7) (7)
noïque bis(trifluorométhyl)octanoïque
1,1,2,2,3,3,4,4,5,5,6,6,6-
Perfluorohexane- Oui Oui Oui
PFHxSA C6H2F13NO2S tridécafluorohexane-1-sulfona- 41997–13–1 Concor. < Concor. < Concor. <
sulfonamide (7) (6) (5)
mide
Acide perfluoro-
Acide 2,2,3,3,4,4-hexafluoro-4- 863090–
PFMBA 4-méthoxybuta- C5HF9O3
(trifluorométhoxy)butanoïque 89–5
noïque
Acide 2-(6-chlo-
Acide 9-chlorohexa-
ro-1,1,2,2,3,3,4,4,5,5,6,6-
9Cl-PF3ONS décafluoro-3-oxano- C8HClF16O4S 756426-58-1 Concor. < Concor. < Concor. < Oui Oui Oui
dodécafluorohexoxy)-1,1,2,2-
nane-1-sulfonique
tétrafluoroéthanesulfonique
Acide 2H,2H,3H,3H- Acide 4,4,5,5,6,6,7,7,8,8,9,9,10,10
Oui
4H-PFUnDA perfluoro-undéca- C11H5F17O2 ,11,11,11- 34598–33–9 Concor. < Concor. < Oui Non Oui
(6)
noïque heptadécafluoroundécanoïque
Acide 1,2,2,3,3,4,5,5,6,6-déca-
Acide perfluoro-
fluoro-4-(1,1,2,2,2- Oui Oui
4-PFECHS 4-éthylcyclohexane C8HF15O3S 646–83–3 Concor. < Concor. < Concor. <
pentafluoroéthyl)cyclohexane- (7) (6)
sulfonique
1-sulfonique
Acide 2,3,3,3-tétrafluo-
Acide perfluoro-2–
ro-2-(1,1,2,2,3,3,3-
HFPO-DA propoxypropa- C6HF11O3 13252–13–6 Concor. < Concor. < Concor. < Oui Oui Oui
heptafluoropropoxy)-propa-
noïque
noïque
a
IUPAC      International Union of Pure and Applied Chemistry
b
N° CAS    Chemical Abstracts Service Registry Number (Numéro de registre du Chemical Abstract Service [CAS])
Les isomères ramifiés mentionnés dans le présent tableau sont des exemples, d’autres isomères ramifiés existent.

ArgRiv    argile de rivière
Séd        sédiments
SédMar    sédiments marins
Oui        le critère de CVR < 50 % a été atteint par 8 laboratoires ou plus
Oui(n)      le critère de CVR < 50 % a été atteint par n laboratoires
Non        le critère n’a pas été atteint par 8 laboratoires ou plus
Concor. <     la plupart des résultats rapportés comme “valeur inférieure à” de manière concordante
5 Interférences
5.1 Généralités
Des interférences dues au mode opératoire peuvent notamment être causées par le contact de l’échantillon
avec du matériel en polytétrafluoroéthylène (PTFE). Pour éviter d’augmenter les valeurs de blanc, il convient
d’utiliser de préférence du matériel en verre, acier, polyéther éther cétone (PEEK), polypropylène (PP) ou
polyéthylène haute densité (PEHD) pour l’échantillonnage, l’extraction et l’analyse.
5.2 Interférences liées à l’extraction, au nettoyage et au traitement des extraits
Il convient de s’efforcer de réduire le plus possible les niveaux de bruit de fond dus au matériel dans les
blancs de méthode de sorte que le blanc de méthode corresponde au maximum à la moitié de la limite de
rapportage (8.8). Les résidus de faible poids moléculaire présents dans le matériel contenant des polymères
fluorés tels que le Viton (caoutchouc fluorocarboné), le PVDF (polyfluorure de vinylidène), etc., qui est
souvent utilisé dans les équipements de CL, peuvent donner des valeurs de blanc, par exemple dans le cas

du PFOA. Il doit être vérifié que les récipients d’échantillonnage (7.1) et les flacons d’échantillon (7.4) ne
présentent pas d’éventuelle contamination de fond avant utilisation.
5.3 Interférences liées à l’analyse par CLHP-SM/SM
Les pics asymétriques (en front ou en traînée) ou les pics élargis ou une combinaison de ceux-ci sont
révélateurs d’interférences en chromatographie. Les constituants de la matrice de l’échantillon peuvent avoir
une incidence sur l’ionisation des substances cibles. Ceux-ci peuvent supprimer ou renforcer l’ionisation. Ces
interférences de matrice peuvent être détectées et corrigées à l’aide d’étalons internes spécifiques marqués
par un isotope. Les substances ayant des temps de rétention similaires peuvent produire des ions ayant des
rapports masse/charge (m/z) similaires à ceux produits par les analytes cibles peuvent interférer avec la
détermination. Ces interférences peuvent conduire à des pics mal résolus et/ou à des pics supplémentaires
sur les chromatogrammes de masse des analytes cibles. En fonction de leurs niveaux dans l’échantillon, ces
substances peuvent compromettre l’exactitude et la fidélité des résultats. Tant que le pic considéré peut être
intégré séparément des interférences, il peut être utilisé.
Les sources de contamination typiques dans le système CL sont notamment les dégazeurs sous vide, les
frittés et les tubes ainsi que les joints de tête de pompe. Pour éviter de telles interférences, le dégazage des
éluants, par exemple, peut être réalisé en utilisant de l’hélium au lieu de dégazeurs sous vide. Les frittés et
tubes en polymère fluoré doivent être remplacés par des frittés et tubes en acier inoxydable ou en PEEK. Le
cas échéant, des joints de tête de pompe en PE doivent être utilisés.
Une colonne de retard (ou de délai) permet d’éviter la contamination de fond provenant de l’intérieur de
l’instrumentation (7.13).
6 Réactifs
Toujours utiliser des réactifs certifiés ou de qualité analytique dans la mesure du possible. Conserver
les réactifs dans des flacons en verre ou en polypropylène (7.10) munis d’un bouchon métallique ou en
polypropylène. Éviter d’utiliser des bouchons contenant des polymères fluorés et vérifier que les réactifs
sont exempts de contaminants en effectuant régulièrement des mesurages à blanc, voir le mode opératoire
de blanc de méthode (8.8).
6.1 Eau ultrapure, H O, déionisée.
6.2 Acétonitrile, CH CN.
6.3 Méthanol, CH OH.
6.4 Hydroxyde de sodium, NaOH, de l’hydroxyde d’ammonium, NH OH, peut aussi être utilisé.
6.5 Acide acétique, CH COOH, > 96 % (fraction massique).
6.6 Formiate d’ammonium, NH HCO , de l’acétate d’ammonium NH CO CH ou du carbonate
4 2 4 2 3
d’ammonium (NH ) CO peuvent aussi être utilisés.
4 2 3
6.7 Solvant d’extraction, acétonitrile: méthanol (1:1) contenant de l’hydroxyde de sodium à 0,05 mol/l.
Peser par exemple 2 g d’hydroxyde de sodium (6.4) dans un mélange de 500 ml d’acétonitrile (6.2) et 500 ml
de méthanol (6.3).
D’autres solvants présentant des propriétés chimiques similaires et une concentration d’hydroxyde de
sodium différente de celle indiquée ici peuvent être utilisés, à condition que la comparabilité avec le mode
opératoire de la présente norme soit démontrée.

6.8 Solvant de conditionnement, acétonitrile: méthanol: eau (1:1:1).
Mélanger par exemple 250 ml d’eau (6.1) à 250 ml d’acétonitrile (6.2) et 250 ml de méthanol (6.3).
6.9 Solvant d’élution, acétonitrile: méthanol (1:1) contenant de l’acide acétique à 0,05 mol/l.
Ajouter par exemple 0,3 ml d’acide acétique (6.5) à un mélange de 50 ml d’acétonitrile (6.2) et 50 ml de
méthanol (6.3).
6.10 Phase mobile, solution d’éluat de formiate d’ammonium contenant 5 % de méthanol.
Peser par exemple 1,2 g de formiate d’ammonium (6.6) dans un mélange de 3 800 ml d’eau (6.1) et 200 ml de
méthanol (6.3).
6.11 Étalons de référence.
N’utiliser que des étalons de référence constitués d’au moins 95 % (fraction massique) de l’isomère linéaire,
pour la détermination quantitative des analytes (voir le Tableau 1).
NOTE Des ampoules de composés individuels ou de mélanges de ceux-ci sont disponibles sur le marché.
6.12 Étalons marqués par un isotope.
Les étalons marqués par un isotope sont utilisés pour l’étalonnage interne. Cela permet de corriger les pertes
survenant au cours du processus analytique ou d’autres variations des conditions analytiques qui peuvent
conduire à un biais.
NOTE Des ampoules d’étalons marqués par un isotope individuel ou de mélanges de ceux-ci sont disponibles sur
le marché.
6.13 Solutions mères, intermédiaires et d’étalonnage.
Calculer la concentration de toutes les solutions de référence et d’étalonnage sur la base de la quantité
d’anions dissous (composé neutre). Toutes les solutions sont conservées à l’abri de la lumière à (5 ± 3) °C.
La durée de conservation des solutions est d’au moins un an. Les solutions sont amenées à température
ambiante avant utilisation. Pour certains composés, il nécessaire de réaliser une sonication ou une agitation
par vortex, voire les deux.
6.13.1 Solutions mères d’étalons de référence.
Préparer des solutions mères des étalons de référence (6.11) dans de l’acétonitrile (6.2) ou du méthanol (6.3).
6.13.2 Solutions mères d’étalons marqués par un isotope.
Préparer des solutions mères des solutions d’étalons marqués par un isotope (6.12) dans de l’acétonitrile
(6.2) ou du méthanol (6.3).
NOTE Le HFPO-DA 13C n’est pas stable dans l’acétonitrile.
6.13.3 Solutions mères d’étalons de référence pour le contrôle qualité de vérification de la courbe
d’étalonnage.
Préparer des solutions mères d’étalons de référence indépendants (6.11) dans de l’acétonitrile (6.2)
ou du méthanol (6.3). Les étalons de référence indépendants sont de préférence obtenus auprès
d’autres fournisseurs. Il convient qu’au moins un tiers des analytes des solutions mères des étalons de
référence (6.13.1) soit présent dans la solution de vérification de l’étalonnage. Il convient que chaque solution

de vérification d’étalonnage contienne, si cela est pertinent pour les composés à analyser, des composés
représentatifs au moins pour les groupes suivants:
— acides carboxyliques perfluorés: PFBA, PFHxA, PFOA, PFDA, PFTeDA, PFODA;
— acides sulfoniques perfluorés: PFBS, PFHxS, PFOS, PFDS, PFDoDS;
— fluorotélomères: 4:2 FTS, 10:2 FTS;
— perfluoro-sulfonamides: PFBSA;
— acides perfluoro-sulfonamide-acétiques: EtPFOSAA, MePFOSAA;
— divers: DONA, 4-PFECHS, HFPO-DA, 8:2 diPAP.
Utiliser de préférence des étalons provenant d’un fournisseur différent pour la solution de vérification de
l’étalonnage ou au moins des mélanges différents provenant du même fourni
...