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ILNAS-EN ISO 20596-2:2022 Edition 09/2022
Water quality - Determination of cyclic volatile methylsiloxanes in water - Part 2: Method using liquid-liquid extraction with gas chromatography-mass spectrometry (GC-MS) (ISO 20596-2:2021)
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Abstract

This document specifies a method for the determination of certain cyclic volatile methylsiloxanes (cVMS) in environmental water samples with low density polyethylene (LDPE) as a preservative and subsequent liquid-liquid extraction with hexane containing 13C-labeled cVMS as internal standards. The extract is then analysed by gas chromatography-mass spectrometry (GC-MS). NOTE Using the 13C-labeled, chemically identical substances as internal standards with the same properties as the corresponding analytes, minimizes possible substance-specific discrimination in calibrations. Since these substances are least soluble in water, they are introduced via the extraction solvent hexane into the system.

Status

Standard - Active

Origin

Technical Committee :
CEN/TC 230 : Water analysis

Implementation

start of the vote on the project    26/05/2022   date of ratification (dor)    19/09/2022
end of the vote on the project    18/08/2022   date of anouncement (doa)    31/12/2022
start of the vote on the final project    27/11/2023   date of publication (dop)    31/03/2023
end of the vote on the final project    22/01/2024   date of withdrawal (dow)    31/03/2023


Publication Official Journal
of the Grand-Duchy of Luxembourg
20/03/2023
Reference Mémorial A N° 153

International Classification for Standards (ICS codes) :

13.060.50 : Examination of water for chemical substances

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