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Qptimization of a multi-residue method for 101 pesticides in green tea leaves using. gas chromatography-tandem mass spectrometry

文献类型： 外文期刊

作者： Hou, Xue 2 ; Lei, ShaoRong 1 ; Guo, LingAn 1 ; Qiu, ShiTing 1 ;

作者机构： 1.Sichuan Acad Agr Sci, Cent& Anal & Testing, Chengdu, Peoples R China

2.Minist Agr, Lab Qual & Safety Rigk Assessment Agroprod Chengd, Chengdu, Peoples R China

关键词： Tea leaves;Pesticide residues;SPE;GC-MS/MS;PSA/GCB

期刊名称：REVISTA BRASILEIRA DE FARMACOGNOSIA-BRAZILIAN JOURNAL OF PHARMACOGNOSY （ 影响因子：2.01； 五年影响因子：2.534 ）

ISSN： 0102-695X

年卷期： 2016 年 26 卷 4 期

页码：

收录情况： SCI

摘要： A method for analysis of 101 pesticide residues in tea leaves was developed and validated for the first time. Pure acetonitrile was used as extraction solvent rather than acetonitrile after matrix hydration based on ' the amount of co-extracts and recoveries performance. During clean-up procedure, primary-secondary amine/graphitized carbomblack (500 mg) was selected, which exhibited outstanding properties ih cleanup capabilities and recoveries of pesticides comparing to primary-secondary amine/graphitized carbon black (250 mg); NH2-Carbon and TPT absorbents. The-method was validated employing gas chrornatograply coupled to tanderarnass spectrOmetry at the spiked toneentrationdevels of 0.050 and.0:100 mg kg(-1). For,most of the targeted Pesticides, the Percent recoveries range from 70 to 120%, with relative standard " deviations <20%. The linear correlation coefficient's (r(2)) were higher than 0.99 at concentration levels of 0.025-0.250"mg kg(-1). Limits of tmantification ranged from LI to 25.3 mu g kg(-1) for all pesticides. The developed method Was successfully applied to the determination of pesticides in tea leaf samples. (C) 2016 SOciedade Brasileira de Farinacognosia. Publishedby Elsevier Editora Ltda.

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