微波萃取-气相色谱质谱法测定塑料中的氯苯类化合物

Determination of Chlorobenzenes in Plastics by Microwave Extraction and Gas Chromatography Mass Spectrometry

本研究建立了微波萃取-气相色谱质谱法测定塑料中12种氯苯类化合物的分析方法。该方法以正己烷和丙酮混合溶剂(V/V=1/1)为提取剂,微波萃取后用佛洛里硅土柱净化,气相色谱质谱进行定量分析。结果表明:在5~500 ng/ml浓度范围内12种氯苯类化合物线性良好,检出限为0.5~3.8μg/kg。在3个添加水平下,平均回收率分别为74.8%~87.3%、80.6%~92.2%、90.9%~104.1%,相对标准偏差分别为2.94%~9.09%、1.46%~6.24%、1.77%~5.64%。

A method was developed for the determination of 12 chlorobenzene compounds in plastics by microwave extraction gas chromatography mass spectrometry, which using hexane and acetone mixed solvent（V/V =1/1） as extraction agent, microwave extraction with florie silica column purification, gas chromatography and mass spectrometry quantitative analysis. The results show that the 12 compounds all have good linear relationship in the concentration range of 5~500 ng/ml with the detection limit of 0.5~3.8 μg/kg. At three different addition levels, the respective average recoveries are 74.8%~87.3%, 80.6%~92.2% and 90.9%~104.1%, and the relative standard deviations are 2.94%~9.09%, 1.46%~6.24% and 1.77%~5.64%.