Determination of benzene in aqueous samples by membrane inlet, solid phase microextraction and purge and trap extraction with isotope dilution gas chromatography-mass spectrometry

C. Creaser, D. Weston, J. Wilkins, Clare P. Yorke, J. A. Irwin, B. Smith
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引用次数: 13

Abstract

The determination of benzene in aqueous samples is reported using membrane inlet, solid phase microextraction and purge and trap extraction techniques combined with gas chromatography-mass spectrometry. The membrane inlet and solid phase microextraction techniques have been applied to the analysis of soft drink samples and the performance characteristics of these methods compared to the established purge and trap method. Isotope dilution quantitative procedures with hexadeuterobenzene as internal standard were used in combination with all three sampling inlets. Detection limits were at, or below the parts per billion (µg l–1) level with analytical precision (%RSD) in the range 3–8%.
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膜入口、固相微萃取、吹扫捕集萃取-同位素稀释气相色谱-质谱法测定水样中苯
采用膜入口法、固相微萃取法、吹扫捕集萃取法和气相色谱-质谱联用技术测定了水中苯的含量。将膜入口和固相微萃取技术应用于软饮料样品的分析,并与已建立的吹扫和捕集方法进行了比较。以六烯二苯为内标的同位素稀释定量方法与所有三个采样入口结合使用。检出限等于或低于十亿分之一(µg - 1)水平,分析精密度(%RSD)在3-8%范围内。
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