6种杀虫剂在上海青中的残留消解动态及膳食风险评估

Residue dynamics and dietary intake risk sssessment of 6 kinds of pesticides in Brassica rapa var. chinensis

中文关键词:  杀虫剂  上海青  残留消解动态  膳食风险评估

英文关键词:pesticide  Brassica rapa var. chinensis  residual dynamics  risk assessment

中文摘要:

      目的 评价蔬菜生产中6种常用杀虫剂5%啶虫脒乳油、15%哒螨灵水乳剂、20%溴氰虫酰胺可分散油悬浮剂、30%唑虫酰胺悬浮剂、22%氟啶虫胺腈悬浮剂和60 g/L乙基多杀菌素悬浮剂在十字花科蔬菜上海青中的残留消解动态, 评估其膳食摄入风险。方法 于2018年4~10月在福州采用喷雾的施药方法进行了6种药剂在上海青上的残留试验, 通过超高效液相-串联质谱法(ultra performance liquid chromatography-tandem mass spectrometry, UPLC-MS/MS)检测6种药剂在上海青中的残留量, 并对6种药剂可能产生的膳食摄入风险进行评估。结果 6种杀虫剂在上海青中的回收率在90.8%~99.6%, 相对标准偏差(relative standard deviation, RSD)在1.1%~3.7%; 啶虫脒、哒螨灵、溴氰虫酰胺、唑虫酰胺、氟啶虫胺腈、乙基多杀菌素在上海青中的降解半衰期为分别为3.6、6.2、3.6、4.6、1.7和2.9 d。用药后1~14 d, 啶虫脒、哒螨灵、溴氰虫酰胺和乙基多杀菌素在上海青中的残留量均分别低于其定量限; 唑虫酰胺和氟啶虫胺腈在上海青中的最高残留量分别为0.5136 mg/kg和1.4488 mg/kg; 6种药剂在上海青中残留的风险商值(risk quotient, RQ)均<1。结论 6种药剂在上海青中的最终残留均低于我国在《食品中农药最大残留限量》中规定的其在蔬菜(叶菜类)中最高残留限量(maximum residue limits, MRLs), 6种药剂的膳食暴露风险较低, 残留处于安全水平。

英文摘要:

      Objective To evaluate the residue and degradation dynamics of 6 commonly used insecticides in cruciferous vegetables, including 5% acetamiprid EC, 15% pyridaben EW, 20% cyantraniliprole OD, 30% tolfenpyrad SC, 22% sulfoxaflor SC and 60 g/L spinetoram SC on Brassica chinensis, and evaluate their dietary intake risk assessment. Methods Six pesticide residue tests was carried out and the degradation dynamics on April to October, 2018, and final residues of 6 pesticides in Brassica chinensis were detected by ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). The dietary intake risk assessment was conducted by using risk quotient method. Results The average recoveries of 6 pesticides in B. chinensis ranged from 90.8% to 99.6%, the relative standard deviations (RSD) were 1.1%?3.7%. The half-lives of 6 pesticides in Brassica chinensis were 3.6, 6.2, 3.6, 4.6, 1.7 and 2.9 days, respectively. The final residues of acetamiprid, pyridaben, cyantraniliprole and spinetoram in Brassica chinensis were all lower than their limit of quantification at 1 to 14 days after administration. The highest residues of tolfenpyrad and sulfoxaflor in Brassica chinensis were 0.5136 mg/kg and 1.4488 mg/kg, respectively. The residual risk quotient (RQ) of 6 pesticides in Brassica chinensis were all smaller than 1. Conclusion Compared with the recommended maximum residue limits (MRLs) in the “maximum residue limits of pesticides in food” for 6 pesticides in leafy vegetables, the final residue is lower than the MRLs. The dietary risk of 6 pesticides in Brassica chinensis is relatively low, which is not hazardous to people.