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NS-EN ISO 20596-2:2022

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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.

Document information

  • Standard from SN
  • Published:
  • Edition: 2022-09
  • Version: 1
  • Document type: NAT
  • ICS 13.060.50
  • National Committee CEN/TC 230

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