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改进的QuEChERS-GC-MS法快速分析茶叶中30种农药残留
引用本文:李春艳,孔祥虹,何强,杜宝中,王娜.改进的QuEChERS-GC-MS法快速分析茶叶中30种农药残留[J].中国食物与营养,2010(2):57-60.
作者姓名:李春艳  孔祥虹  何强  杜宝中  王娜
作者单位:1. 西安理工大学理学院,西安,710054
2. 陕西出入境检验检疫局,西安,710068
基金项目:国家质检总局科研课题 
摘    要:本文建立了茶叶中常用的30种农药的快速分析方法。以0.1%乙酸的乙腈(V/V)作为溶剂,Agilent SampliQ提取试剂对样品进行1min提取后,用C18和Agilent SampliQ净化试剂净化,用10ml0.1%乙酸的乙腈与甲苯(体积比3:1)洗脱,气相色谱-质谱(GC-MS)检测。30种农药的检测限(LOD)为0.03μg/kg(氟草胺)~13μg/kg(苯胺灵)。采用内标法定量,添加回收试验结果表明,30种农药的平均回收率为74%~108%,相对标准偏差为0%~10.38%。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。

关 键 词:QuEChEgS  气相色谱-质谱  茶叶  农药  多残留检测

Determination of 30 Pesticide Residues in Tea Using Modified QuEChERS_Gas Chromatography_Mass Spectrometry
LI Chun-yan,KONG Xing-hong,HE Qiang,DU Bao-zhong,WANG Na.Determination of 30 Pesticide Residues in Tea Using Modified QuEChERS_Gas Chromatography_Mass Spectrometry[J].Food and Nutrition in China,2010(2):57-60.
Authors:LI Chun-yan  KONG Xing-hong  HE Qiang  DU Bao-zhong  WANG Na
Affiliation:1College of Science, Xi'an University of Technology, Xian 710054; 2Shaanxi Entry-Exit Inspection and Quarantine Bureau, Xian 710068)
Abstract:A method for the fast determination of 30 pesticides in tea was developed. Tea samples were extracted with acetonitrile (MeCN) containing 0.1% acetic acid (Hac) as solvent, then added Agilent SampliQ extraction reagent for 1 minute and clean-up by C18 and Agilent SampliQ clean-up reagent, eluted with 10mL acetonitrile-toluene (3: 1, v/v) and determined by gas chromatography- mass spectrometry (GC-MS). The limits of detection (LODs) ranged from 0.03 μ g/kg (benfluralin) to 13μ g/kg (profam) and quantified by internal standard method. The recoveries of those pesticides were 74% - 108%, and the relative standard deviations were 0% 10.38 %. The sensitivity, Accuracy and precision of the method all satisfy the requirement of pesticide residue analysed.
Keywords:QuEChERS
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