ASE提取GPC净化双塔双柱气相色谱法测定土壤中有机氯农药

对土壤中8种有机氯农药(α-HCH、β-HCH、γ-HCH、δ-HCH、p,p’-DDE、p,p’-DDD、o,p’-DDT、p,p’-DDT)进行了分析,使用加速溶剂萃取(ASE)仪对土壤样品中的目标组分进行萃取、凝胶渗透色谱(GPC)仪对萃取液净化、双塔双柱同时进样分析,采用双电子捕获检测器(ECD)同时定性定量测定。结果表明,该方法检测效果较好,8种有机氯农药的回收率在81.3%～88.6%,相对标准偏差为3.9%～5.7%,检出限为0.18～0.37μg/kg。与传统的方法相比,该方法操作简便、重复性好,定性定量更准确。

Determination of organochlorine pesticides in soil with ASE-GPC technology and GC coupled with dual-tower and dual-column

The determination of 8 organochlorine pesticides(α-HCH,β-HCH,γ-HCH,δ-HCH,p,p’-DDE,p,p’-DDD,o,p’-DDT,p,p’-DDT) in soil was studied in this paper.The organochlorine pesticides in soil were extracted by accelerated solvent extraction(ASE) and purified through gel permeation chromatography(GPC),and then analyzed by GC coupled with dual-tower and dual-column.The resulted showed that the recovery of this established method was range from 81.3% to 88.6%,and the relative standard deviation between 3.9%-5.7%.The method detection limit(MDL) of 8 organochlorine pesticides varier from 0.18 μg/kg to 0.37 μg/kg.Comparing to the traditional method,this established method was simple and had good extraction efficiency,purification effect and good reproducibility.