GC-PCI-MS分析蔬菜中有机磷类农药残留  

Determination of organophosphorus pesticide residues in vegetables by GC-PCI-MS

作　　者：马莉莉[1,2] 周金玉 张承聪[2] 吴晓波 屈天尧 

机构地区：[1]云南省农药检定所,云南昆明650094 [2]云南大学化学科学与工程学院,云南昆明650091

出　　处：《云南大学学报（自然科学版）》2010年第3期333-337,共5页Journal of Yunnan University(Natural Sciences Edition)

基　　金：云南省农药检定所农药分析研究课题资助

摘　　要：建立了气相色谱-正化学电离(PCI)-质谱技术分析蔬菜中有机磷类农药残留的方法,试样样品用乙腈超声波提取,GPC净化,采用GC-PCI-MS-SIM方式检测,排除了杂质的干扰,提高了分析灵敏度.结果表明:最低检测限为:0.69～4.24μg.kg-1;精密度RSD为:1.69%～11.01%;平均回收率为:69.5%～121.8%.A determination of OPs-residue pesticides in vegetables has been developed by gas chromatography-positive chemical ionization mass spectrometry（GC-PCI-MS）.Pesticides were extracted from sample with acetonitrile in an ultrasonic bath and cleaned up on GPC,then were determined by gas chromatography with positive chemical ionization mass spectrometric detection in a selected ion monitoring mode.The method was accurate,sensitive and selective,the average recoveries ranged from 69.5% to 121.8%,while the relative standard deviations ranged from 1.69% to 11.01%,lowest detectable limit ranged from 0.69 to 4.24μg·kg^-1.

关 键 词：气相色谱-正化学电离-质谱法 蔬菜 农药残留 

分 类 号：O657.7[理学—分析化学]