6种杀虫剂在上海青中的残留消解动态及膳食风险评估

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...

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

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.