气相色谱-双柱双电子捕获检测器测定鱼肉中的有机氯农药  

Determination of Organochlorine Pesticides in Fish by GC with Dual-Column and Dual-ECD

作　　者：曹方方[1] 于建钊[2] 费金岩 许秀艳[2] 许人骥[2] 吕怡兵[2] 

机构地区：[1]山东省环境监测中心站,济南250101 [2]中国环境监测总站,北京100012 [3]抚顺市环境监测中心站,抚顺113000

出　　处：《理化检验（化学分册）》2017年第3期258-262,共5页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：国家自然科学基金资助项目(41101476);流域水生态环境质量监测与评价研究(2013ZX07502001)

摘　　要：采用气相色谱-双柱双电子捕获检测器(ECD)测定鱼肉样品中的10种有机氯农药(六氯苯、α-六六六、β-六六六、γ-六六六、δ-六六六、七氯、p,p′-DDE、o,p′-DDT、p,p′-DDD和p,p′-DDT)。样品经正己烷振荡提取后,提取液经自制酸性硅胶柱净化,采用DB-35MS和DB-5毛细管色谱柱进行双柱双ECD分析。10种有机氯农药的线性范围均为5.0~250μg·L^(-1),检出限(3.143s)在0.2~1.2μg·kg^(-1)之间。加标回收率在85.7%~121%之间,测定值的相对标准偏差(n=6)不大于16%。GC with dual-column and dual-ECD was applied to the determination of 10 organochlorine pesticides in fish, including hexachlorobenzene, α-BHC, β-BHC, γ-BHC, ＆BHC, heptachlor, p,pI-DDE, o,p＇- DDT, p,p＇-DDD and p, p/-DDT. After the samples were extracted by oscillation with hexane, the extract was cleaned-up with self-made acidic silica gel column and the purified solution was analyzed by GC with dual-column （DB-35MS and DB-5） and dual-ECD system. The linearity ranges of 10 organochlorines were all 5.0--250 μg·L^-1 , with detection limits （3. 143s） in the range of 0. 2 -- 1. 2 μg · kg^-1. Recovery rates obtained by standard addition method were in the range of 85.7 %-121% and RSDs （n= 6） were within 16 %.

关 键 词：气相色谱法 双柱双电子捕获检测器 有机氯农药 鱼肉 

分 类 号：O657.7[理学—分析化学]