6种农药在荷兰豆上残留消解动态和膳食风险评估  

Residue dissipation dynamics and dietary risk assessment of 6 pesticides in snow pea

作　　者：周艳琳 杨晶 ZHOU Yanlin;YANG Jing(Wuwei Agricultural Product Quality Supervision and Inspection Station,Wuwei 733000,Gansu,China)

机构地区：[1]武威市农产品质量安全监督管理站,甘肃武威733000

出　　处：《农药》2024年第12期911-916,共6页Agrochemicals

基　　金：武威市科技计划项目,重点研发计划(WW2201YFN008):武威市蔬菜农药残留风险评估、管控技术及推广应用。

摘　　要：[目的]了解吡唑醚菌酯、高效氯氰菊酯、啶虫脒、苯醚甲环唑、嘧菌酯和噻虫嗪在荷兰豆上的残留消解动态,评估其人体膳食摄入风险。[方法]采用喷雾的施药方法进行了6种农药在荷兰豆上的田间残留试验,通过QuEChERS前处理结合GC-MS/MS分析方法测定了6种农药在荷兰豆上的残留量,并对其进行膳食风险评估。[结果]6种农药在荷兰豆上的添加回收率为72.3%~108.4%,RSD为1.7%~9.3%,在0.005~0.5 mg/L的范围内质量浓度与其峰面积呈良好的线性关系,吡唑醚菌酯、高效氯氰菊酯、啶虫脒、苯醚甲环唑、嘧菌酯和噻虫嗪的消解半衰期分别为2.2~2.7、2.2~2.7、3.0~3.7、0.9~3.1、1.1~3.1、0.8~2.4 d,均属于易降解农药。膳食风险评估表明,不同年龄段消费群体的急性、慢性膳食风险值均低于100%,处于可接受的安全水平。[结论]推荐4.5%高效氯氰菊酯乳油、5%啶虫脒乳油、30%嘧菌酯悬浮剂和25%噻虫嗪水分散粒剂分别按照600、450、450 mL/hm^(2)和120 g/hm^(2)在荷兰豆上喷施,安全间隔期均可设为1 d,在种植过程严格按照生产操作规程规范种植,控制施药剂量,遵守农药安全间隔期,不会对人群健康产生影响,25%吡唑醚菌酯悬浮剂按照600 mL/hm^(2),10%苯醚甲环唑微乳剂按照1499 g/hm^(2)在荷兰豆上喷施,安全间隔期分别为10、3 d,不适宜在开花结荚期使用。[Aims]To investigate the dynamics of residual dissipation of pyraclostrobin,beta-cypermethrin,acetamiprid,difenoconazole,azoxystrobin and thiamethoxam on snow pea and to evaluate the dietary risk of them.[Methods]Field residue tests of 6 pesticides on snow pea were carried out by spray method.The residue amount on snow pea was determined by QuEChERS pretreatment combined with GC-MS/MS analysis method,and the dietary risk assessment was conducted.[Results]The recoveries of 6 pesticides were 72.3%-108.4%,and RSD was 1.7%-9.3%.The mass concentration had a good linear relationship with its peak area in the range of 0.005-0.5 mg/L.The dissipation halflives of pyraclostrobin,beta-cypermethrin,acetamiprid,difenoconazole,azoxystrobin and thiamethoxam were 2.2-2.7,2.2-2.7,3.0-3.7,0.9-3.1,1.1-3.1,0.8-2.4 d respectively,which indicated that they were easily degradable pesticides.Dietary risk assessment showed that the acute and chronic dietary risk values of different age groups of consumers were lower than 100%,which was in an acceptable safe level.[Conclusions]It is recommended to spray beta-cypermethrin 4.5%EC,acetamiprid 5%EC,azoxystrobin 30%SC and thiamethoxam 25%WG on snow pea according to 600,450,450 mL/ha and 120 g/ha,respectively.The preharvest interval of the four pesticides can be set to 1 d.When the planting process is strictly in accordance with the production operation rules,the application dose is controlled and the preharvest interval of pesticide is observed,there will be no effect on the health of the population.Pyraclostrobin 25%SC should be sprayed at 600 mL/ha and difenoconazole 10%ME should be sprayed at 1499 g/ha,with the preharvest interval of 10 and 3 d respectively.They are not suitable to be use during the flowering and pod forming periods.

关 键 词：荷兰豆 农药 残留消解动态 膳食风险评估 

分 类 号：TQ450.2[化学工程—农药化工]