Evaluation of cleanup procedures in pesticide multi-residue analysis with QuEChERS in cinnamon bark

文献类型： 外文期刊

第一作者： Zhang, Zihao

作者： Zhang, Zihao;Hao, Xianghong;Han, Lijun;Song, Shuangyu;Yao, Wei;Dong, Maofeng

作者机构：

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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