茶叶中三唑磷农药的浸出规律及其风险研究  

Leaching Behavior and Risk Assessment of Triazophos in Tea during Brewing

作　　者：陈玲 CHEN Ling(Shanghai Kangshi Food Technology Co.,Ltd.,Shanghai 201103,China)

机构地区：[1]上海康识食品科技有限公司,上海201103

出　　处：《中国茶叶》2025年第3期54-57,共4页China Tea

摘　　要：通过对茶叶中三唑磷的加标试验,对含有不同质量分数三唑磷的茶叶冲泡后测定茶汤中三唑磷含量,计算茶叶中三唑磷的浸出率,探究茶叶中三唑磷农药浸出规律,评估三唑磷农药的慢性累积暴露风险,为下一步制定茶叶中三唑磷农药最大残留限量标准提供科学依据。结果表明,茶汤中三唑磷浸出率与茶叶中农药残留量和萃取温度相关。萃取温度对三唑磷浸出率的影响显著,在100℃下的平均浸出率(15.74%)显著高于64℃下的平均浸出率(5.58%)。以加标质量分数为500μg/kg的茶叶为评估对象,通过饮茶时茶叶中农药浸出率及其人体暴露水平,评估获得沸水冲泡时摄入三唑磷的危害指数(HI)仅为0.022。The aim of this study was to investigate the leaching pattern of triazophos in tea infusions and to conduct a chronic cumulative exposure risk assessment of triazophos,in order to provide a scientific basis for the maximum residue limit standards of triazophos in tea in the future.Through spiking experiments of triazophos in tea,tea leaves with different concentrations of triazophos were brewed,and the contents of triazophos in the brewed tea in-fusion were measured to calculate the leaching rate of triazophos in the tea leaves.The results show that the leach-ing rate of triazophos in tea infusion was related to the residue level of the pesticide in the tea and the extraction temperature.There was a significant difference in the effect of extraction temperature on the leaching rate of triazo-phos,with the average leaching rate at 100℃(15.74%)being significantly higher than that at 64℃(5.58%).Us-ing tea with a spiked concentration of 500μg/kg as the subject of the assessment,the hazard index(HI)of the triazo-phos intake during boiling water brewing was found to be only 0.022,as assessed by the leaching rate of the pesti-cide and the level of human exposure through tea consumption.

关 键 词：茶叶 三唑磷 茶汤 浸出率 风险评估 

分 类 号：S571.1[农业科学—茶叶生产加工] S482.33[农业科学—作物学]