水果中26种有机氯及拟除虫菊酯农药残留GC-ECD测定

Determ Ination 26 Organochlorine and Pyrethroid Pesticides Residues in Fruit by GC-ECD

摘要:

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0.001～0.005mg/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。

Abstract:

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 acetonitrile and by ultrasonic,organochlorine pesticides and pyrethroids pesticides were cleaned-up by PSA,and C18,determ ined by gas chromatography-electron 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(RSD)between 1.1% and 6.7% for all compounds.The method has proven to be simplicity,higher sensitivity and accuracy.