水果中26种有机氯及拟除虫菊酯农药残留GC-ECD测定

摘要

In this manuscript,a method for determing 26 organochlorine and pyrethroid pesticides residues in fruit has been build by GC -ECD technique. The pesticide residues in Fruit samples were extracted with acetonitnle and by ultrasonic,organochlorine pesticides and pyre-throids pesticides were cleaned -up by PSA. and CIS . determ ined by gas chromatography-e-lectron capture detection (GC -ECD). The detection limits were 0.001 - 0.005 mg/kg. The average recoveries for the pesticides ranged from 84. 5% to 104. 5% ,with the relative standard deviation (RSI))between 1.1% and 6.7% for all compounds. The method has proven to be simplicity,higher sensitivity and accuracy.%利用气相色谱(GC)建立了水果中26种有机氯农药同时测定的方法.试样中农药残留在超声波振荡条件下用乙腈提取,经PSA、C18净化,GC-电子捕获检测器(ECD)检测.方法的检出限为0.001～0.005 mg/kg,回收率为84.5％～104.5％,相对标准偏差为1.1％～6.7％.该方法的灵敏度、准确度和精密度均符合农药残留测定的技术要求.