A multi-residue method for the determination of 124 pesticides in rice by modified QuEChERS extraction and gas chromatography-tandem mass spectrometry
文献类型: 外文期刊
作者: Hou, Xue 2 ; Han, Mei 1 ; Dai, XiaoHang 1 ; Yang, XiaoFeng 1 ; Yi, Shengguo 1 ;
作者机构: 1.Sichuan Acad Agr Sci, Ctr Anal & Testing, Chengdu 610066, Sichuan, Peoples R China
2.Chinese Acad Sci, Chengdu Inst Organ Chem, Chengdu 610041, Sichuan, Peoples R China
3.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
关键词: pesticides;quechers method;multi-residue analysis;rice;GC-MS/MS;validation
期刊名称:FOOD CHEMISTRY ( 影响因子:7.514; 五年影响因子:7.516 )
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收录情况: SCI
摘要: A modified QuEChERS method for simultaneous determination of 124 pesticide residues in rice was established and validated. The rice samples were initially extracted with acetonitrile (MeCN), and the targeted pesticides were purified following the dispersive solid phase extraction (d-SPE) cleanup method and detected by gas chromatography-tandem mass spectrometry (GC-MS/MS). The efficiency of citrate-buffered and unbuffered method in liquid extraction procedure was compared; the amount of primary secondary amine (PSA) was optimised. In the method validation, correlation coefficients (r2) were higher than 0.990 with the linear ranging from 10 to 200μgkg~(-1). At the fortification levels of 20-200 μg kg~(-1), average recoveries ranged from 70% to 122.7% with the RSD <20%.
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