FprEN 17759

SLOVENSKI STANDARD
01-april-2026
Anorganska gnojila - Določanje pH-vrednosti raztopine gnojil iz amonijevega
nitrata z veliko vsebnostjo dušika
Inorganic fertilizers - Determination of pH of a solution of ammonium nitrate fertilizers of
high nitrogen content
Anorganische Düngemittel - Bestimmung des pH-Wertes in einer Lösung mit
Ammoniumnitratdüngemitteln mit hohem Stickstoffgehalt
Engrais inorganiques - Détermination du pH d'une solution d'engrais à base de nitrate
d'ammonium à forte teneur en azote
Ta slovenski standard je istoveten z: prEN 17759
ICS:
65.080 Gnojila Fertilizers
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
prEN 17759
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2026
ICS 65.080 Will supersede CEN/TS 17759:2022
English Version
Inorganic fertilizers - Determination of pH of a solution of
ammonium nitrate fertilizers of high nitrogen content
Engrais inorganiques - Détermination du pH d'une Anorganische Düngemittel - Bestimmung des pH-
solution d'engrais à base de nitrate d'ammonium à Wertes in einer Lösung mit
forte teneur en azote Ammoniumnitratdüngemitteln mit hohem
Stickstoffgehalt
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 260.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
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.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17759:2026 E
worldwide for CEN national Members.

prEN 17759:2026 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Principle . 4
5 Reagents . 4
5.1 Distilled or demineralized water . 4
5.2 Buffer solution A . 4
6 Apparatus and equipment . 5
6.1 pH meter . 5
6.2 Graduated flask . 5
6.3 Beaker . 5
6.4 Balance . 5
6.5 Airtight vessel . 5
7 Sampling and sample preparation . 5
7.1 Sampling . 5
7.2 Sample preparation . 5
8 Procedure . 5
8.1 Calibration of the pH meter . 5
8.2 Determination . 5
9 Expression of the results . 5
10 Precision . 6
10.1 Inter-laboratory study . 6
10.2 Repeatability . 6
10.3 Reproducibility . 6
11 Test report . 6
Annex A (informative) Results of the inter-laboratory study . 7
A.1 Inter-laboratory study . 7
A.2 Statistical results . 7
Bibliography . 9

prEN 17759:2026 (E)
European foreword
This document (prEN 17759:2026) has been prepared by Technical Committee CEN/TC 260 “Fertilizers
and liming materials” the secretariat of which is held by DIN.
This document is currently submitted to CEN Enquiry.
This document will supersede CEN/TS 17759:2022.
prEN 17759:2026 includes the following significant technical changes with respect to
CEN/TS 17759:2022:
a) the CEN Technical Specification has been adopted as a European Standard;
b) update of Scope (Clause 1);
c) update of Normative references (Clause 2);
d) Sampling and sample preparation (Clause 7) has been updated;
e) the use of a nitrogen stream during calibration and measurement (8.1) has been removed;
f) Clause 10 (Precision) and Annex A including results of inter-laboratory study added;
g) update of Bibliography.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves the
...