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固相萃取-气相色谱法同时检测茶叶中多种农药和多氯联苯残留
引用本文:吴林,吴晓波,张承聪,马莉莉,林诗云,鲁广秋,唐娜. 固相萃取-气相色谱法同时检测茶叶中多种农药和多氯联苯残留[J]. 食品科学, 2011, 32(14): 223-226. DOI: 10.7506/spkx1002-6630-201114047
作者姓名:吴林  吴晓波  张承聪  马莉莉  林诗云  鲁广秋  唐娜
作者单位:1.云南省农药检定所2.云南大学化学科学与工程学院
基金项目:云南省农药检定所农药分析研究项目
摘    要:建立茶叶中21种有机氯、拟除虫菊酯类农药和多氯联苯(polychlorinated biphenyls,PCBs)残留固相萃取(solid-phase extraction,SPE)-气相色谱分析方法。用正己烷-丙酮(1:1,V/V)提取,经Envi-Carb/NH2复合固相萃取柱净化,采用RTX-5毛细管柱分离,气相色谱-电子捕获检测器(gas chromatography-electron caputure detector,GC-ECD)检测。在0.02、0.05、0.3mg/kg三个添加水平,平均回收率为68.64%~125.62%,相对标准偏差(relative standard deviation,RSD)为1.05%~12.78%,该方法的检测限(detection of limit,LOD)在0.0022~0.0129mg/kg之间,适用于茶叶试样中痕量残留的分析。

关 键 词:气相色谱-电子捕获检测器  茶叶  农药  多氯联苯  固相萃取  

Multiresidue Determination of Pesticides and Polychlorinated Biphenyls in Tea by Solid-phase Extraction and Gas Chromatography
WU Lin,,WU Xiao-bo,ZHANG Cheng-cong,MA Li-li,LIN Shi-yun,LU Guang-qiu,TANG Na. Multiresidue Determination of Pesticides and Polychlorinated Biphenyls in Tea by Solid-phase Extraction and Gas Chromatography[J]. Food Science, 2011, 32(14): 223-226. DOI: 10.7506/spkx1002-6630-201114047
Authors:WU Lin    WU Xiao-bo  ZHANG Cheng-cong  MA Li-li  LIN Shi-yun  LU Guang-qiu  TANG Na
Affiliation:(1. Agrichemical Examination Section of Yunnan, Kunming 650034, China;2. College of Chemical science and Engineering, Yunnan University, Kunming 650091, China)
Abstract:A solid-phase extraction and gas chromatographic method was established to simultaneously determine 21 organochlorines,pyrethroids and polychlorinated biphenyls(PCBs) in tea.Tea samples were extracted with hexane-acetone(1:1,V/V) in an ultrasonic bath and cleaned up on an Envi-Carb/NH2 SPE column.The analytes were separated on a RTX-5 capillary column and detected in 63Ni-ECD(electron capture detector).The recoveries for the analytes were from 68.64% to 125.62% with a relative standard deviation(RSD) from 1...
Keywords:tea  pesticides  polychlorinated biphenyls(PCBs)  solid-phase extraction(SPE)  gas chromatography-electron caputure detector(GC-ECD)  
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