人参中18种有机氯农药多残留分析方法

Analytical method of 18 organochlorine pesticides in Ginsene

摘要: 建立了人参中18种有机氯农药及其异构体残留量的气相色谱分析方法。样品以30mL石油醚-丙酮(1∶ 1,体积比)为提取剂,冰浴超声提取15 min,重复2次,提取液用浓硫酸净化,采用HP-5与DB1701毛细管色谱柱双柱定性分离,气相色谱-电子捕获检测器(GC-ECD)测定。结果表明:该方法在10、50、100 μ g/kg 3个水平下的添加回收率除艾氏剂与苯氟磺胺在62%左右外,其余分别在75.1%~107.7%、72.1%~98.6%和71.5%~105.4%,相对标准偏差(RSD)分别为2.5%~ 11.3%、2.6%~12.5%和1.1%~11.2%;方法的检出限为3.14 μ g/kg,定量限为10 μ g/kg。

Abstract: A gas chromatographic method for determination of 18 organochlorine pesticides in Ginsene was established.Clean up by sulfonation treatment was optimized .The procedure involves ultrasonic extraction 1)as the extract solvent,concentrated sulphuric acid as clean-up method and determination by GC-ECD.Result showed that the percentage recoveries were 75.1%-107.7%,72.1%-98.6%,71.5%-105.4%(except aldrin and dichlofluanid were 62%),and the relative standard deviation (RSD) were 2.5%-11.3%,2.6%-12.5%,1.1%-11.2%.The limit of detection(LOD) of the method was 3.14 μ g/kg,the limit of quantification(LOQ) was 10 μ g/kg.