溴氰虫酰胺和吡蚜酮在南瓜中的残留消解动态  

Residues and Digestion Dynamics of Cyantraniliprole and Pymetrozine in Pumpkin

作　　者：李安英 张少军[1] 陈勇达[1] 赵旭东 李红艳[1] 郑振山[1] LI Anying;ZHANG Shaojun;CHEN Yongda;ZHAO Xudong;LI Hongyan;ZHENG Zhenshan(Institute of Genetics and Physiology,Hebei Academy of Agriculture and Forestry Sciences,Laboratory of Quality and Safety Risk Assessment for Agro-products(Shijiazhuang),Ministry of Agriculture and Rural Affairs,Shijiazhuang 050051,Hebei,China)

机构地区：[1]河北省农林科学院遗传生理研究所,农业农村部农产品质量安全风险评估实验室(石家庄),河北石家庄050051

出　　处：《中国蔬菜》2021年第1期79-83,共5页China Vegetables

基　　金：河北省农林科学院财政专项(2019-1-7-2)。

摘　　要：建立了用于检测南瓜中溴氰虫酰胺、吡蚜酮残留的分析方法,并对河北、浙江两地的溴氰虫酰胺·吡蚜酮水分散粒剂在南瓜中的消解动态规律和最终残留进行了研究。样品经乙腈提取,N-丙基乙二胺(PSA)净化后,采用液相色谱-串联质谱仪测定。结果表明,南瓜样品中溴氰虫酰胺和吡蚜酮的最低检出浓度分别为0.01 mg·kg^-1和0.005 mg·kg^-1,溴氰虫酰胺在0.01~1.0 mg·kg^-1浓度范围内的添加回收率为100%~104%,吡蚜酮在0.005~0.5 mg·kg^-1浓度范围内的添加回收率为96%~107%;溴氰虫酰胺和吡蚜酮在南瓜中的残留消解规律均符合一级动力学方程;南瓜中溴氰虫酰胺最终残留量≤0.031 mg·kg^-1,吡蚜酮最终残留量≤0.023 mg·kg^-1。按企业推荐剂量450 g·hm^-2和675 g·hm^-2施药,安全间隔期为14 d,收获期的南瓜果实食用安全。This paper developed an analytical method for detection of cyantraniliprole and pymetrozine residues in pumpkin,and studied the digestion dynamic rule and final residues of cyantraniliprole·pymetrozine water dispersible granules in pumpkin from Hebei and Zhejiang Provinces.The samples were extracted with acetonitrile,purified by N-propyl ethylenediamine(PSA)and determined by liquid chromatography tandem mass spectrometry.The results showed that the limit of quantification(LOQ)of cyantraniliprole and pymetrozine in pumpkin samples were 0.01 mg·kg^-1 and 0.005 mg·kg^-1.The addition recovery rate of cyantraniliprole in the range of 0.01-1.0 mg·kg^-1 was 100%-104%.The addition recovery rate of pymetrozine in the range of 0.005-0.5 mg·kg^-1 was 96%-107%.The residue digestion rules of cyantraniliprole and pymetrozine in pumpkin were all conformed to the first-order kinetics process.The final residue of cyantraniliprole in pumpkin was≤0.031 mg·kg^-1,and the final residue of pymetrozine was≤0.023 mg·kg^-1.The recommended dosage by enterprise was 450 and 675 g·hm^-2,and the safe interval was 14 days.Pumpkin fruits during harvesting period were safe to eat.

关 键 词：溴氰虫酰胺 吡蚜酮 南瓜 残留消解 安全间隔期 

分 类 号：S481.8[农业科学—农药学]