EN ISO 20596-2:2022
水质. 水中环状挥发性甲基硅氧烷的测定. 第2部分: 液-液萃取气相色谱-质谱(GC-MS)法

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)

作废

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标准号

EN ISO 20596-2:2022

发布

2022年

发布单位

欧洲标准化委员会

当前最新

EN ISO 20596-2:2022

 

 

适用范围

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.

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