Simultaneous determination of 118 pesticide residues in Chinese teas by gas chromatography-mass spectrometry

文献类型： 外文期刊

第一作者： Yang, Xin

作者： Yang, Xin;Xu, De Chang;Qiu, Jian Wei;Zhang, Hua;Zhang, Ying Chun;Dong, Ai Jun;Ma, Ying;Wang, Jing;Wang, Jing

作者机构：

关键词： pesticides;multi-residue analysis;Chinese tea;GPC;SPE;GC-MS;ORGANOCHLORINE PESTICIDES

期刊名称：CHEMICAL PAPERS （ 影响因子：2.097； 五年影响因子：1.831 ）

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收录情况： SCI

摘要： An efficient and sensitive method for simultaneous determination of 118 pesticide residues in teas has been established and validated. A multi-residue analysis of pesticides in tea involved extraction with ethyl acetate-hexane, clean-up using gel permeation chromatography (GPC) and solid-phase extraction (SPE), and subsequent identification and quanti. cation of the selected pesticides by gas chromatography-mass spectrometry (GC-MS). For most of the target analytes, optimized pretreatment processes led to no significant interference with analysis of sample matrix, and the determination of 118 compounds was achieved in about 60 min. In the linear range of each pesticide, the correlation coefficient was R-2 >= 0.99. At the low, medium and high three forti. cation levels of 0.05-2.5 mg kg(-1), 118 pesticides average recoveries range from 61 % to 121 % and relative standard deviations (RSD) were in the range of 0.6-9.2 % for all analytes. The limits of detection for the method were 0.00030-0.36 mg kg(-1), depending on each pesticide. (C) 2008 Institute of Chemistry, Slovak Academy of Sciences

分类号： O6

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