QuEChERS/GC测定蔬菜中24种有机磷农药残留  

Determining 24 organophosphorus pesticide residues in vegetable with QuEChERS/GC

作　　者：潘守奇[1] 孙军[1] 董静[1] 吕建霞[1] 马小洁[1] 

机构地区：[1]潍坊出入境检验检疫局,山东潍坊261041

出　　处：《中国测试》2010年第3期53-56,共4页China Measurement & Test

摘　　要：对QuEChERS农药多残留同时分析方法进行了样品提取及净化方面的改进,建立了蔬菜中24种有机磷类农药残留QuEChERS/GC同时分析的方法。样品用0.1%醋酸的乙腈提取,净化采用分散固相萃取的方式,采用DB-1701(30m×0.32mm×0.25μm)毛细管柱分离,FPD(P)检测。24种农药的浓度范围在0.002～0.05mg/kg时,回收率在79%～103.5%之间,RSD为1.1%～5.6%。各农药的检测限:苯硫磷为0.01mg/kg,三硫磷、三唑磷为0.004mg/kg,其他21种为0.002mg/kg。该方法步骤简单,消耗费用低,净化效果好,具有良好的灵敏度、回收率和重现性。For improving extraction and purification of vegetable’s multiple pesticide residues in QuEChERS method, a gas chromatography method has been developed for determining 24 organophosphorus pesticide residues in vegetable. The pesticide residues were extracted from sample with 0.1% acetic acid in acetonitrile,separated by capillary column DB-1701 （30 m×0.32 mm×0.25 μm） and detected by FPD （P）. In the range of 0.002~0.05 mg/kg, recoveries （n=6） are 79%~103.5%,and RSD are 1.1%~5.6%. The limits of EPN are 0.01 mg/kg,carbophenothion and triazophos are 0.004 mg/kg,and other 21 pesticides are 0.002 mg/kg. The method is very easy to operate, cheap for cost,excellent for purification,and has the advantages of good recovery,repeatability,and sensitivity.

关 键 词：QuEChER方法 农药残留 分散固相萃取 

分 类 号：S63[农业科学—蔬菜学] TQ450.7[农业科学—园艺学]