绿茶中毒死蜱和唑虫酰胺基体标准物质制备  

Preparation of matrix standard material of chlorpyrifos and tolfenpyrad in green tea

作　　者：林涛[1] 李梦霞 郭瑾 陈静[3] 李茂萱 李彦刚[1] 刘宏程[1] LIN Tao;LI Mengxia;GUO Jin;CHEN Jing;LI Maoxuan;LI Yangang;LIU Hongcheng(Quality Standards and Testing Technology Research Institute,Yunnan Academy of Agricultural Sciences,Kunming 650205,China;School of Medicine,Yunnan University of Business Management,Kunming 650106,China;Tea Research Institute,Yunnan Academy of Agricultural Sciences,Kunming 650205,China)

机构地区：[1]云南省农业科学院质量标准与检测技术研究所,昆明650205 [2]云南工商管理学院医学院,昆明650106 [3]云南省农业科学院茶叶研究所,昆明650205

出　　处：《化学分析计量》2022年第9期1-5,共5页Chemical Analysis And Meterage

基　　金：云南省重点研发计划项目(202102AE090021)。

摘　　要：介绍绿茶中毒死蜱和唑虫酰胺基体标准物质制备过程。在茶树上喷洒毒死蜱和唑虫酰胺农药,鲜叶经采青、萎凋、杀青、揉捻、干燥等步骤后制成绿茶,然后粉碎混匀,得到绿茶中毒死蜱和唑虫酰胺基体标准物质。均匀性、稳定性检验结果表明该标准物质的均匀性、稳定性均满足要求。经8家实验室联合定值,毒死蜱的标准值为0.295 mg/kg,扩展不确定度为0.027(置信区间为95%,k=2);唑虫酰胺的标准值为0.373 mg/kg,扩展不确定度为0.023(置信区间为95%,k=2)。该绿茶中毒死蜱和唑虫酰胺满足基体标准物质的要求,可用于绿茶检测的质量控制。The process of preparation of matrix standard material of chlorpyrifos and tolfenpyrad in green tea was introduced.After spraying chlorpyrifos and tolfenpyrad pesticides on tea trees,fresh leaves were made into green tea by harvesting,withering,fixation,rolling,drying.Green tea was crushed and mixed to obtain green tea chlorpyrifos and tolfenpyrad matrix standard material.The standard material had good homogeneity and stability,the standard value of chlorpyrifos was 0.295 mg/kg and the expanded uncertainty was 0.027,the standard value of tolfenpyrad was 0.373mg/kg and the expanded uncertainty was 0.023 determined by 8 laboratories (the confidence interval was 95%,k=2).The chlorpyrifos and oxazolamide in green tea can meet the requirements of matrix reference materials and can be used for quality control of green tea.

关 键 词：绿茶 毒死蜱 唑虫酰胺 基体标准物质 

分 类 号：O657[理学—分析化学]