矫健 1吴迪 1李秋梅 1罗雪婷 1张希跃 1潘洪吉1
作者信息
摘要
Abstract
[Objective] The aim was to establish a LC-MS/MS method for simultaneous determination of eight pesticides residues in vegetable.[Method] The residue dynamic of chlorantraniliprole,flonicamid,spirotetramat,nitenpyram,indoxacarb,sulfoxaflor,spinetoram,imidacloprid in four vegetables were analyzed by LC-MS/MS.[Result] Linear relationships between peak area and mass concentration of 8 pesticides were obtained in the range of 0.005-0.200 mg/kg.When the spiked levels were 0.005,0.020 and 0.200 mg/kg,the average recoveries of(nitenpyram,flonicamid,chlorantraniliprole,indoxacarb,imidacloprid)ranged from 60.8％ to 108.5％,with RSD (n =5) ranged from 1.7％ to 13.5％.When the spiked levels were 0.02,0.06 and 0.20 mg/kg,the average recoveries of spirotetramat,sulfoxaflor,and spinetoram ranged from 71.4％ to 108.1％,with RSD (n =5) ranged from 1.1％ to 6.2％,which meets the impection requirement of pesticide residue analysis methods.When recommended dosage of pesticides were applied,the half-lives of imidacloprid in four vegetables were 1.4,8.4,2.5 and 6.7 d.[Conclusion] The results provide theoretical basis for making the maximum residue limits for vegetables in China.关键词
液相色谱串联质谱/蔬菜/农药多残留/消解动态Key words
Liquid chromatography-tandem mass spectrometry/Vegetable/Pesticide residue/Dissipation dynamic分类
农业科技
