加速溶剂萃取-气相色谱法测定土壤中有机氯农药和多氯联苯  

Determination of Organochlorine Pesticides and Polychlorinated Biphenyls in Soils by Gas Chromatography with Accelerated Solvent Extraction

作　　者：张岩[1] 张景发[1] 陈艳梅[1] 孟娟[1] 韩翠英[1] 

机构地区：[1]国土资源部天津产品质量监督检测中心,天津300191

出　　处：《岩矿测试》2010年第5期491-496,共6页Rock and Mineral Analysis

基　　金：国土资源地质大调查--地下水污染测试技术研究项目资助(1212010634607)

摘　　要：试验了加速溶剂萃取土壤中有机氯农药和多氯联苯残留的最佳条件。结果表明,采用正己烷-丙酮混合溶剂(体积比1:1)为提取剂,萃取温度100℃,压力为10.3MPa;采用弗罗里硅土固相萃取柱对样品净化,毛细管柱分离,用配有电子捕获检测器的气相色谱进行检测,平均加标回收率为83.6%～109.0%,相对标准偏差(RSD,n=11)为1.11%～5.88%,检出限为0.69～1.85ng/g。方法简单、快捷、经济,适应于土壤中的有机氯农药和多氯联苯的测定。The optimum extraction condition was studied for organochlorine pesticides and polychlorinated biphenyls in soils using accelerated solvent extraction （ASE）.The sample was extracted with hexane/acetone （1：1,V/V） with extraction temperature of 100 ℃ and pressure of 10.3 MPa and cleaned up by solid phase extraction with Florisil column,followed by separation on a capillary column.The target organic pollutants were then quantitatively determined by gas chromatography using electron capture detection.The detection limits of the method was 0.69 ～ 1.85 ng/g and average recovery was 83.6% ～ 109.0% with precision of 1.11% ～ 5.88% RSD （n=11）.The method is simple,efficient,economical and suitable for the analysis of organochlorine pesticides and polychlorinated biphenyls in soil samples.

关 键 词：加速溶剂萃取 气相色谱法 土壤 有机氯农药 多氯联苯 

分 类 号：O657.72[理学—分析化学] S482.32[理学—化学]