膜萃取-微扑集/气相色谱-质谱测定小体积水样中痕量苯系物的方法  

Membrane ExtractionMicrotrapGC/MS Determination of Trace Pollutants Benzenesubstituted from a Small Volume of Water Sample*

作　　者：王立[1] 王继宗[1] 

机构地区：[1]北京市劳动保护科学研究所

出　　处：《环境科学》1999年第4期89-92,共4页Environmental Science

基　　金：北京市自然科学基金

摘　　要：用膜萃取－微捕集／气相色谱－质谱（ＭＥ－ＭＴ／ＧＣ－ＭＳ）分析方法，分别测定了环境地表水、工厂排污水、饮用水和汽油等样品中痕量苯、甲苯和二甲苯等有机污染物．结果表明，膜萃取－微捕集回收率为８９％～９９％，相对标准偏差为１．１６％～３．６０％，采样体积为５μｌ～２．０ｍｌ，研究测定范围为１ｎｇ～１２０ｎｇ，最低检出限为０．０５ｎｇ／ｇ～０．１ｎｇ／ｇ．ＭＥ－ＭＴ／ＧＣ－ＭＳ分析方法具有采样体积小、样品基体干扰小、无溶剂处理和可在线操作等特点．ＭＥ－ＭＴ装置具有体积小、重量轻、操作简便、性能稳定可靠和适用性强等特点。In this paper an analytical method of the Membrane ExtractionMicrotrap/Gas ChromatographyMass Spectrometer(MEMT/GCMS)for determination of trace pollutants benzenesubstituted from a small volume of water sample was researched.The experimental results showed that the recoveries of benzene,toluene,m,pxylene and oxylene were 89%99%,and the RSDs of them were 1.16%360%,and the sampling volumes of them were 0.0052.00ml,and the experimental concentrations of them mainly were 0.560g/L,and the low detection limits of them were 0.050.1ng/g.The application results also showed that the MEMT/GCMS method was a very promising,easy to handle,low cost,no solvent required,detection limits at ppt level when a small volume of water sample was analysed and measured.

关 键 词：膜萃取-微捕集 环境水 苯系污染物 GC-MS 

分 类 号：X520.2[环境科学与工程—环境工程] X132