International Standard
ISO 20596-2:2021
Water quality — Determination of cyclic volatile methylsiloxanes in water — Part 2: Method using liquid-liquid extraction with gas chromatography-mass spectrometry (GC-MS)
Reference number
ISO 20596-2:2021
Edition 1
2021-01
© ISO 2024
International Standard
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Published (Edition 1, 2021)

ISO 20596-2:2021

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CHF 96
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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.

General information

  • Status
     : Published
    Publication date
     : 2021-01
    Stage
    : International Standard published [60.60]
  • Edition
     : 1
    Number of pages
     : 16
  • Technical Committee :
    ISO/TC 147/SC 2
    ICS :
    13.060.50 
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