A multi-residue method for the determination of pesticides in tea using multi-walled carbon nanotubes as a dispersive solid phase extraction absorbent

文献类型: 外文期刊

第一作者: Lei, ShaoRong

作者: Lei, ShaoRong;Qiu, ShiTing;Guo, LingAn;Yi, ShengGuo;Liu, Wei;Hou, Xue;Hou, Xue

作者机构:

关键词: Tea;QuEChERS;MWCNTs;Pesticide residues;PTV;GC-MS/MS

期刊名称:FOOD CHEMISTRY ( 影响因子:7.514; 五年影响因子:7.516 )

ISSN:

年卷期:

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收录情况: SCI

摘要: A modified QuEChERS (quick, easy, cheap, effective, rugged and safe) method using multi-walled carbon nanotubes (MWCNTs) as a dispersive solid phase extraction (d-SPE) absorbent was established for analysis of 78 pesticide residues in tea. A 6 mg MWCNT sample was selected as the optimised amount based on the distribution of pesticide recoveries and clean-up efficiency from 6 mL acetonitrile extracts. The matrix effects of the method were evaluated and matrix-matched calibration was recommended. The method was validated employing gas chromatography coupled to tandem mass spectrometry (GC-MS/ MS) at the spiked concentration levels of 0.05,0.1 and 0.15 mg kg~(-1). For most of the targeted pesticides, the percent recoveries range from 70% to 120%, with relative standard deviations (RSDs) <20%. The linear correlation coefficients (r~2) were higher than 0.99 at concentration levels of 0.025-0.500 mg kg~(-1). In this study, MWCNTs were proved to be a promising d-SPE absorbent with excellent cleanup efficiency, which could be widely applied for the analysis of pesticide residues.

分类号: TS2`TS201.2

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