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Analysis of pesticide residues in commercially available chenpi using a modified QuEChERS method and GC-MS/MS determination
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Analysis of pesticide residues in commercially available chenpi using a modified QuEChERS method and GC-MS/MS determination
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Analysis of pesticide residues in commercially available chenpi using a modified QuEChERS method and GC-MS/MS determination
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Journal Article
Analysis of pesticide residues in commercially available chenpi using a modified QuEChERS method and GC-MS/MS determination
2020
Overview
To ensure the safety of the commercially available chenpi, a convenient and fast analytical method was developed for the determination of 133 pesticide residues in chenpi using gas chromatography-tandem mass spectrometry (GC-MS/MS). In this study, different extraction solvents, redissolution solvents and adsorbents were tested according to the recovery and purification effect to obtain a modified QuEChERS method. The samples were extracted with acetonitrile. During the clean-up step, octadecyl-modified silica (C18) and graphitized carbon black (GCB) were selected, and aminopropyl (NH2) was used instead of primary secondary amine (PSA) because of its weaker ion exchange capacity which had little effect on the recovery of ditalimfos. Samples were quantified by matrix-matched calibration with internal standards. All pesticides showed good linearity in the respective range, both with values of r2 > 0.99. The average recoveries of the pesticides spiked samples ranged from 70.0% to 112.2% with the RSDs of 0.2%–14.4%. The modified QuEChERS method was validated and applied to twenty real samples. Five pesticides were found in eight batches, but no pesticide exceeded the maximum residue limits (MRL, MRL reference to European commission).
Publisher
Elsevier B.V,Xi'an Jiaotong University, Journal of Pharmaceutical Analysis,Baoding No.1 Central Hospital, Baoding, Hebei Province 071000, China%School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, 110016, China%State Key Laboratory of Core Technology in Innovative Chinese Medicine, Tasly Pharmaceutical Analysis Institute, Tasly Academy, Tianjin 300402, China,School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, 110016, China,Xi'an Jiaotong University,Elsevier
