EN 12916:2006

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Petroleum products - Determination of aromatic hydrocarbon types in middle distillates - High performance liquid chromatography method with refractive index detectionProduits pétroliers - Détermination des familles d'hydrocarbures aromatiques dans les distillats moyens - Méthode par chromatographie liquide a haute performance avec détection par réfractométrie différentielleMineralölerzeugnisse - Bestimmung von aromatischen Kohlenwasserstoffgruppen in Mitteldestillaten - HPLC-Verfahren mit Brechzahl-DetektorTa slovenski standard je istoveten z:EN 12916:2006SIST EN 12916:2006en75.080ICS:SIST EN 12916:20001DGRPHãþDSLOVENSKI
STANDARDSIST EN 12916:200601-september-2006

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12916May 2006ICS 75.080Supersedes EN 12916:2000
English VersionPetroleum products - Determination of aromatic hydrocarbontypes in middle distillates - High performance liquidchromatography method with refractive index detectionProduits pétroliers - Détermination des famillesd'hydrocarbures aromatiques dans les distillats moyens -Méthode par chromatographie liquide à haute performanceavec détection par réfractométrie différentielleMineralölerzeugnisse - Bestimmung von aromatischenKohlenwasserstoffgruppen in Mitteldestillaten - HPLC-Verfahren mit Brechzahl-DetektorThis European Standard was approved by CEN on 20 April 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12916:2006: E

Column selection and use.15 Bibliography.16

the volume fraction of a material respectively. NOTE 2 By convention, the aromatic hydrocarbon types are defined on the basis of their elution characteristics from the specified liquid chromatography column relative to model aromatic compounds. Their quantification is performed using an external calibration with a single aromatic compound for each of them, which may or may not be representative of the aromatics present in the sample. Alternative techniques and test methods may classify and quantify individual aromatic hydrocarbon types differently. WARNING — The use of this standard may involve hazardous materials, operations and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 14214, Automotive fuels – Fatty acid methyl esters (FAME) for diesel engines – Requirements and test methods EN ISO 1042, Laboratory glassware – One-mark volumetric flasks (ISO 1042:1998) EN ISO 3170, Petroleum liquids – Manual sampling (ISO 3170:2004) EN ISO 3171, Petroleum liquids – Automatic pipeline sampling (ISO 3171:1988) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 non-aromatic hydrocarbon compound having a shorter retention time on the specified polar column than the majority of mono-aromatic hydrocarbons

d) T+AHs: phenanthrenes, pyrenes, fluoranthenes, chrysenes, triphenylenes, benzanthracenes. 3.7 fatty acid methyl ester FAME mixture of fatty acid methyl esters as specified in EN 14214 4 Principle A known mass of sample is diluted with heptane and a fixed volume of this solution injected into a high performance liquid chromatograph fitted with a polar column. This column has little affinity for non-aromatic hydrocarbons, whilst exhibiting a strong selectivity for aromatic hydrocarbons. As a result of this selectivity, the aromatic hydrocarbons are separated from the non-aromatic hydrocarbons and into distinct bands according to their ring structure, i.e. MAH, DAH and T+AH compounds. The column is connected to a refractive index detector which detects the components as they elute from the column. The electronic signal from the detector is continually monitored by a data processor. The amplitudes of the signals from the aromatics in the sample are compared with those obtained from calibration standards in order to calculate the mass fraction of MAHs, DAHs and T+AHs in the sample. The sum of the DAHs and T+AHs mass fractions is reported as the mass fraction of POLY-AH, and the sum of the MAHs, DAHs and T+AHs mass fractions is reported as the mass fraction of total aromatic hydrocarbons.
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