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

用膜萃取－微脯集／气相色谱－质谱分析方法，分别测定环境地表水，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％。

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

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.