吴雪原1，4，岳永德2，黄冠胜3，林 伟3，汤 锋1，樊 玮1
（1.安徽农业大学，安徽 合肥230036；2.国际竹藤网络中心，北京100102；
3.国家质量监督检验检疫总局,北京100088； 4.安徽出入境检验检疫局，安徽 合肥230061）
摘 要：在生长均匀的茶园喷施氰戊菊酯，采摘施药后2 h和1 h 、2 h、3 h、5 h、7 h、9 h、14 h、21天的茶树鲜叶加工成绿茶，用气相色谱法测定成茶、茶汤和茶渣中反式氰戊菊酯和顺式氰戊菊酯的含量，研究了氰戊菊酯在成茶、茶汤中的残留动态。结果表明：反式氰戊菊酯和顺式氰戊菊酯在成茶中的残留水平随施药间隔天数的增加呈下降趋势，20 mL/667 m2施药剂量下，分别由施药当天2 h的9.40 mg/kg和17.51 mg/kg减小到第21天1.07 mg/kg 和1.53 mg/kg，消解幅度为88.62 %和91.26 %，40 mL/667 m2施药剂量下，分别由施药当天2 h 的20.37 mg/kg 和38.67 mg/kg 减小到第21天的1.94 mg/kg 和 3.06 mg/kg，消解幅度为90.49 %和92.09 %。茶汤中氰戊菊酯含量（y）与成茶中氰戊菊酯含量（x）呈二项式函数关系，反式氰戊菊酯的函数关系为y＝- 0.0007x2﹢0.0242x，顺式氰戊菊酯的函数关系为y＝- 0.0002x2﹢0.0114x。按我国标准，饮茶摄入的氰戊菊酯占ADI的0.049 ％，足以达到保护人体健康水平的要求。而按欧盟的标准，饮茶摄入的氰戊菊酯占ADI的0.0019 ％, 即在10-5水平上，这样的风险水平已接近对非阈效应化学物质的风险控制水平（10-6）。
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Dissipation Behavior of Fenvalerate Residue in Made Tea during Brewing Process and Its Maximum Residues Levels Evaluation
WU Xue-yuan1,4，YUE Yong-de2 ，HUANG Guan-sheng3, LIN Wei3, TANG Feng1，FAN Wei1
(1. Anhui Agriculture University，Hefei 230036，Anhui，China ；2. International Center For Bamboo and Rattan，Beijing 100102，China；3. General Administration of Quality Supervision, Inspection & Quaratine of the PRC, Beijing 100088，China；4. Anhui Entry-exit Inspection and Quarantine Bureau，Hefei 230061，Anhui，China)
Abstract :Fenvalerate was sprayed in a growing equably tea farm. The green shoots was harvested from treated plots at 2 h and 1 h,2 h ,3 h ,5 h, 7 h, 9 h ,14 h, 21 days after the treatment, and manufactured into green tea. The concentration of fenvalerate-trans and fenvalerate-cis in made tea、its infusion and infused leaves were determined by gas chromatography. And dissipation behavior of fenvalerate residue in made tea and its infusion was investigated. Results indicated that the residue level of fenvalerate-trans and fenvalerate-cis in made tea decreased gradually while the plucking interval increased. The residue of fenvalerate-trans and fenvalerate-cis in made tea from 9.40 mg/kg and 17.51 mg/kg at 2 h after the treatment decreased to 1.07 mg/kg and 1.53 mg/kg at 21 days at the dose of 20 mL/667 m2, and from 20.37 mg/kg and 38.67 mg/kg at 2 h decreased to 1.94 mg/kg and 3.06 mg/kg at 21 days at the dose of 40 mL/667 m2. the concentration of fenvalerate residue in tea infusion（y）show quadratic function with that in made tea（x）. quadratic equation is y=－0.0007x2+0.0242x (fenvalerate-trans) and y = 0.0002x2+0.0114x (fenvalerate-cis). According to fenvalerate MRL in tea in China, the percentage of fenvalerate residues intake amounts possibly by drinking tea infusion comparing with ADI is 0.049 ％, which is sufficient for protecting human health. And according to fenvalerate MRL（ maximum residues levels） in tea in EU, the percentage of fenvalerate residues intake amounts comparing with ADI （acceptable daily intake）, is 0.0019 ％, which is on 10-5 level and near the risk control lever（10-6）of "threshold effect" chemical.
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