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  • BSI
    BS ISO 20596-2:2021 Water quality. Determination of cyclic volatile methylsiloxanes in water - Method using liquid-liquid extraction with gas chromatography-mass spectrometry (GC-MS)
    Edition: 2021
    $435.35
    / user per year

Description of BS ISO 20596-2:2021 2021

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.

This document is applicable to the measurement of the following cVMS in rivers, streams, and waste water (influent and effluent):

Table 1
Analytes determined by this method
Analyte Formula Abbreviation CAS a -RN
Octamethylcyclotetrasiloxane C 8H 24O 4Si 4 D4 556-67-2
Decamethylcyclopentasiloxane C 10H 30O 5Si 5 D5 541-02-6
Dodecamethylcyclohexasiloxane C 12H 36O 6Si 6 D6 540-97-6
a

CAS-RN Chemical Abstracts Services Registration Number

This method can be used to determine cVMS from 0,1 µg/l to 250 ?g/l. In well controlled laboratory environments, where contamination is minimized, the lower end of the application range can be diminished by a factor of up to 10.



Standard NumberBS ISO 20596-2:2021
TitleWater quality. Determination of cyclic volatile methylsiloxanes in water - Method using liquid-liquid extraction with gas chromatography-mass spectrometry (GC-MS)
StatusWithdrawn
Publication Date2021-02-05
Withdrawn Date2023-08-09
Identical National Standard OfISO 20596-2
DescriptorsContainers, Test specimens, Water testing, Quality, Preservation, Potable water, Samples, Water, Laboratory testing, Chemical analysis and testing, Biological analysis and testing, Water treatment
ICS13.060.50 Examination of water for chemical substances
CommitteeEH/3/2
ISBN978 0 580 97561 5
PublisherBSI
Pages24

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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