ISO 20596-2:2021 水质 水中循环挥发性甲基硅氧烷的测定 第2部分：气相色谱-质谱法液-液萃取法

标准编号：ISO 20596-2:2021

中文名称：水质 水中循环挥发性甲基硅氧烷的测定 第2部分：气相色谱-质谱法液-液萃取法

英文名称：Water quality — Determination of cyclic volatile methylsiloxanes in water — Part 2: Method using liquid-liquid extraction with gas chromatography-mass spectrometry (GC-MS)

发布日期：2021-01

标准范围

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.

标准预览图