Journal
SEPARATIONS
Volume 9, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/separations9030059
Keywords
pesticides; processing methods; centrifuge; QuEChERS; multi-plug-filtration cleanup
Categories
Funding
- Key Research Projects of Science and Technology for Agriculture of Shanghai [2019-02-08-00-15-F01147]
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A novel and cost-effective pre-processing method has been developed for the simultaneous determination of pyrethroid pesticides in vegetables. The method is convenient, time-saving, and has high recovery rate and low detection limit.
A novel rapid and cost-effective pre-processing method for the simultaneous determination of pyrethroid pesticides in vegetables has been developed and validated. The process of pesticide extraction was carried out by the QuEChERS (quick, easy, cheap, effective, rugged and safe) method combined with filtration by filter paper, and cleanup was carried out by the multi-plug-filtration-cleanup (m-PFC) method with no centrifuge program during the whole process. The pre-processing method is optimized for gas chromatography (GC). The process is convenient and time saving, requiring just a few seconds per sample. The recovery rate (70-120%), limit of detection (0.0001-0.007 mg/kg), precision (0.2-9.3%) and accuracy for each analyte were determined in 10 representative vegetables with good results. Finally, the feasibility of the developed method was further confirmed by the successful determination of pyrethroid-pesticide residues in pyrethroid-containing practical samples within the processing method coupled with thin-layer chromatography and a colloidal-gold test strip.
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