气相色谱-质谱法测定茶叶中32种残留农药  

Multi-residue Determination of 32 Pesticides in Tea by Gas Chromatography-Mass Spectrometry

作　　者：董金斌[1] 王金花[2] 

机构地区：[1]中国铁道科学研究院节能环保劳卫研究所,北京100081 [2]北京出入境检验检疫局技术中心,北京100026

出　　处：《食品科学》2009年第12期230-232,共3页Food Science

摘　　要：建立了茶叶中多种农药残留的分析方法。粉碎后的茶叶样品以乙腈为提取溶剂经超声萃取,萃取液再经石墨化碳固相萃取柱净化,采用GC-EI-MS的选择离子监测(SIM)方式和外标定量方法,同时分析测定了茶叶中的32种农药残留量(17种有机磷、8种有机氯、4种拟除虫菊酯、乙草胺、三唑酮和多效唑)。该方法回收率在48.2%～121.9%之间,相对标准偏差小于18.3%,32种农药的检出限最低为1.0μg/kg,最高为20μg/kg。该方法快速、灵敏、准确,各项技术指标满足国内外农药残留检测的要求,适合茶叶样品中痕量农药残留的分析。The present study developed a method for the determination of 32 pesticide residues （17 organophosphorus, 4 pyrethroids, 8 organochlorines, acetochlor, triadimefon and paclobutrazol） in tea by GC-MS. Pesticide residues were extracted from ground tea with acetonitrile in an ultrasonic fried and purified on a graphitized carbon black column, and then determined by gas chromatography with electron ionization mass spectrometric detection in the selected ion monitoring （SIM） mode. The external standard method was adopted for quantification. The recoveries for the 32 pesticides in tea spiked at three levels ranges from 48.2% to121.9%, with the RSDs of 0.2% - 18.3%, and the detection limits for these pesticides by the method were 0.001 -0.02 mg/kg. This method is rapid, sensitive, and accurate, and its various technical indexes meet the detection requirement of pesticide residues in tea samples.

关 键 词：气相色谱-质谱 茶叶 多种残留 农药 

分 类 号：TS207.53[轻工技术与工程—食品科学] TQ654.2[轻工技术与工程—食品科学与工程]