Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11011768 | Food Chemistry | 2019 | 36 Pages |
Abstract
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 chromatographyâ¯ââ¯tandem mass spectrometry (LC-MS/MS) detection. The extraction solvents, phase partition salts, and cleanup sorbents were optimized. The results showed that 150â¯mg MgSO4â¯+â¯50â¯mg C18 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.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Zihao Zhang, Maofeng Dong, Xianghong Hao, Lijun Han, Shuangyu Song, Wei Yao,