| 茶叶中9种有机氯和拟除虫菊酯农药残留的前处理方法研究 |
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| 引用本文： | 冯洁,汤桦,陈大舟,吴雪,孙正君,李红梅,李蕾. 茶叶中9种有机氯和拟除虫菊酯农药残留的前处理方法研究[J]. 分析测试学报, 2010, 29(10). DOI: 10.3969/j.issn.1004-4957.2010.10.010 |
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| 作者姓名： | 冯洁 汤桦 陈大舟 吴雪 孙正君 李红梅 李蕾 |
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| 作者单位： | 北京化工大学,理学院,化学系,北京,100029;中国计量科学研究院,化学计量与分析科学研究所,北京,100013 |
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| 基金项目： | 质检总局食品安全专项资助项目 |
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| 摘 要： | 建立了一种简便准确的前处理方法用于茶叶中5种有机氯农药和4种拟除虫菊酯类农药的测定。对索氏提取、超声提取、加速溶剂萃取和振荡提取4种提取方法的参数条件进行优化和对比,并对前处理的净化条件进行优化,建立了丙酮-正己烷(7∶3,体积比)溶液振荡提取串联Envi-Carb和LC-AliminaN小柱净化后,经丙酮-正己烷(1∶9)溶液洗脱,浓缩后用GC-MS法测定。茶叶样品中9种农药的加标回收率(n=6)为82%～108%,相对标准偏差为1.2%～4.5%,方法的检出限(以3倍信噪比计)为0.46～12.13ng/g。
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| 关 键 词： | 前处理方法 有机氯 拟除虫菊酯 GC-MS 茶叶 |
Study on Pretreatment Technique of Nine Organochlorine and Pyrethroid Pesticides in Tea by GC- MS |
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| FENG Jie,TANG Hua,CHEN Da-zhou,WU Xue,SUN Zheng-jun,LI Hong-mei,LI Lei. Study on Pretreatment Technique of Nine Organochlorine and Pyrethroid Pesticides in Tea by GC- MS[J]. Journal of Instrumental Analysis, 2010, 29(10). DOI: 10.3969/j.issn.1004-4957.2010.10.010 |
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| Authors: | FENG Jie TANG Hua CHEN Da-zhou WU Xue SUN Zheng-jun LI Hong-mei LI Lei |
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| Affiliation: | FENG Jie1,TANG Hua2,CHEN Da-zhou2,WU Xue2,SUN Zheng-jun2,LI Hong-mei2,LI Lei1(1.Department of Chemistry,College of Science,Beijing University of Chemical Technology,Beijing 100029,China,2.Chemical Metrology & Analytical Science Division of the National Institute of Metrology,Beijing 100013,China) |
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| Abstract: | A simple and repeatable pretreatment method was developed for gas chromatography-mass spectrometry(GC-MS)determination of five organochlorines and four pyrethroid pesticides residues in tea.The operating parameters for Soxhlet extraction(SE),ultrasonic extraction(USE),accelerated solvent extraction(ASE)and oscillation extraction(OE)of pesticides residues in tea samples were optimized and compared.The cleanup procedures for each of the extraction method were also studied and optimized.Experimental results sh... |
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| Keywords: | GC-MS |
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