Simultaneous Determination of 5 Pesticide Residues in Vegetables by Ultra High Performance Liquid Chromatography-Tandem Mass Spectrometry(UPLC-MS/MS)[J]. 2015,34(7):829-835.
Simultaneous Determination of 5 Pesticide Residues in Vegetables by Ultra High Performance Liquid Chromatography-Tandem Mass Spectrometry(UPLC-MS/MS)[J]. 2015,34(7):829-835.DOI:
An analytical method was established for the simultaneous determination of residues of abamectin,emamectin benzoate,imidacloprid,indoxacard,zineb in vegetables by ultra high pressure liquid chromatography-tandem mass spectrometry(UPLC-MS/MS).The samples were extracted with acetonitrile after treated with 0.1% NaOH(containing 10 mmol/L L-cysteine and 10 mmol/L EDTA-Na2),and cleaned up by 0.2 g C18+0.05 g GCB matrix dispersive solid phase extraction.Five kinds of pesticides were separated on a Thermo Hypersil BDS C18(100 mm × 4.6 mm,2.6 μm) column using 10 mmol/L NH4OH-acetonitrile as mobile phase by gradient elution,and determined by MS/MS.The results showed that the calibration curves were linear in the ranges of 50-2 000 μg/L for zineb,and 5-200 μg/L for the rest of analytes.The correlation coefficients were in the range of 0.995 1-0.999 9.The spiked concentration ranges were 0.5-500 μg/kg for five compounds in bean,chilli,pakchoi,cucumber,asparagus and tomato samples,and the spiked recoveries were in the range of 70.8%-103.6% with relative standard deviations(RSD) of 4.5%-13.9%.The limits of detection for zineb ranged from 8.2 μg/kg to 30 μg/kg,and the limits of quantitation were in the range of 27-100 μg/kg.The limits of detection for the rest of compounds were in the range of 0.02-0.7 μg/kg,and the limits of quantitation were 0.07-2.3 μg/kg.The method was rapid,accurate,economical and practical,and could meet the needs of daily inspection.
关键词
阿维菌素甲氨基阿维菌素苯甲酸盐吡虫啉茚虫威代森锌基质分散固相萃取UPLC-MS/MS
Keywords
abamectinemamectin benzoateimidaclopridindoxacarbzinebdispersive solid phase extractionultra high performance liquid chromatography-tandem mass spectrometry(UPLC-MS/MS)