Evaluation of cleanup procedures in pesticide multi-residue analysis with QuEChERS in cinnamon bark
文献类型: 外文期刊
作者: Zhang, Zihao 1 ; Dong, Maofeng 2 ; Hao, Xianghong 1 ; Han, Lijun 1 ; Song, Shuangyu 1 ; Yao, Wei 1 ;
作者机构: 1.China Agr Univ, Coll Sci, Beijing 100193, Peoples R China
2.Shanghai Acad Agr Sci, Pesticide Safety Evaluat Res Ctr, Inst Agrofood Stand & Testing Technol, Shanghai 201106, Peoples R China
关键词: QuEChERS; d-SPE; Repetitive d-SPE; Pesticides; Cinnamon
期刊名称:FOOD CHEMISTRY ( 影响因子:7.514; 五年影响因子:7.516 )
ISSN: 0308-8146
年卷期: 2019 年 276 卷
页码:
收录情况: SCI
摘要: Cinnamon bark is a very complex spices matrix for pesticide residue analysis. In this study, two cleanup procedures, dispersive solid-phase extraction (d-SPE) and repetitive d-SPE, combined with Quick, Easy, Cheap, Effective, Rugged and Safe (QuEChERS) extraction were both investigated and applied for the determination of 60 pesticide residues in cinnamon bark by liquid chromatography - tandem mass spectrometry (LC-MS/MS) detection. The extraction solvents, phase partition salts, and cleanup sorbents were optimized. The results showed that 150 mg MgSO4 + 50 mg C-18 showed the best performance in d-SPE. The repetitive d-SPE achieved less matrix effects than d-SPE, but several high water-solubility analytes were lost during the cleanup, and also the 10 fold dilution compromised the sensitivities of analytes. With the validated QuEChERS-d-SPE method, 44 of 60 pesticides obtained satisfactory recoveries (71%-118%) and RSDs (2%-27%) at three to five spiking levels. The method was applied to monitor 15 market cinnamon samples.
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