噻虫嗪在茶叶及绿茶加工过程中的残留消解动态研究  

Dissipation of thiamethoxam residue in tea and green tea processing

作　　者：赵秀霞[1] 张正竹[1] 胡祎芳[1] 苏婷[1] 侯如燕[1] 

机构地区：[1]安徽农业大学茶与食品科技学院教育部茶叶生物化学与生物技术重点开实验室,合肥230036

出　　处：《安徽农业大学学报》2011年第3期439-443,共5页Journal of Anhui Agricultural University

基　　金：农业部现代农业产业技术体系(农科教发[2008]10号);张一元科技创新基金项目共同资助

摘　　要：研究25%噻虫嗪水分散粒剂在茶叶上的残留、消解动态以及在绿茶加工过程中的降解率。结果表明,噻虫嗪在茶叶上的原始沉积量因不同施药处理有所差异,残留消解动态规律符合一级动力学方程。不同时间采摘的茶鲜叶加工成绿茶过程中噻虫嗪的降解率为1.2%～22.7%,平均降解率为8.2%。高低浓度施药处理的消解速率基本一致,平均消解系数(k)为0.431 8±0.002 0,噻虫嗪在茶鲜叶上的半衰期为1.56～1.62 d,噻虫嗪在绿茶上的半衰期为1.60～1.64 d,消解99%所需要时间(T0.99)为10.18～10.49 d,消解到0.01 mg.kg-1所需时间为15.75～17.22 d。The dissipation of thiamethoxam 25% WG residue in green tea shoots and green tea processing was investigated.The results showed that the dissipation dynamics of thiamethoxam were followed first order kinetic equation at different application treatments in tea.The green tea processing resulted in a residue degrada-tion of 1.2%-22.7%,and the average of degradation rate is 8.2%.The dissipation rates were identical in the dif-ferent application treatments.The dissipation coefficient（k） was 0.431 8±0.002 0.Half-life of thiamethoxam was found to be 1.56-1.62 days in green tea shoots and 1.60-1.64 days in green tea,and T0.99 from 10.18 to 10.49 days respectively

关 键 词：噻虫嗪 茶鲜叶 绿茶 茶叶加工过程 残留 降解 

分 类 号：X592[环境科学与工程—环境工程]