Journal
FOOD CHEMISTRY
Volume 359, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2021.129936
Keywords
Neonicotinoid pesticides; molecular imprinting polymer (MIPs); Thiamethoxam; Thiacloprid; UHPLC-MS; MS (QQQ); honey
Funding
- University Malaya Research BKP Malaysia [BK061-2017]
- [RP018B-14AFR]
- [IIRG002A-19SAH]
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Novel MIPs nanoparticles were synthesized for selective and sensitive extraction of thiamethoxam and thiacloprid from honey samples, with optimal conditions identified for adsorption. UHPLC-MS/MS was used for detection and quantification, showing good precision and recovery rates for both pesticides in honey samples.
In this work, new selective and sensitive dual-template molecularly imprinted polymer nanoparticles (MIPs) were synthesized and characterized. Sorbent MIPs were investigated for simultaneous extraction and clean-up of thiamethoxam and thiacloprid from light and dark honey samples. In this study, ultra-high-performance liquid chromatography-tandem mass spectrometry triple-quadrupole (UHPLC-MS/MS) (QQQ) was used to detect and quantify the pesticides. The kinetic model with adsorption kinetics of sorbent was investigated. The optimal adsorption conditions were 80 mg of polymer MIPs, a 30-min extraction time, and a pH of 7. The detection limit (LOD) and the quantification limit (LOQ) varied from 0.045 to 0.070 mu g kg-1 and from 0.07 to 0.10 mu g kg- 1, respectively. The intra-day and inter-day precision (RSD, %) ranged from 1.3 to 2.0% and from 8.2 to 12.0%, respectively. The recovery of thiamethoxam and thiacloprid ranged from 96.8 to 106.5% and 95.3 to 104.4%, respectively, in light and dark honey samples.
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