信阳市茶叶中铅元素检测及风险评估  

Detection and risk assessment of Pb in tea in Xinyang City

作　　者：梁少茹 党永超 赵丰华 蒋双丰 郑杰 付群英 王晓 LIANG Shao-ru;DANG Yong-chao;ZHAO Feng-hua;JIANG Shuang-feng;ZHENG Jie;FU Qun-ying;WANG Xiao(Xinyang Academy of Agricultural Sciences,Xinyang 464000,Henan,China;Xinyang Wenxin Tea Co.,Ltd.,Xinyang 464000,Henan,China)

机构地区：[1]信阳市农业科学院,河南信阳464000 [2]信阳市文新茶叶有限责任公司,河南信阳464000

出　　处：《湖北农业科学》2023年第6期142-146,共5页Hubei Agricultural Sciences

基　　金：河南省农业科学院“四优四化”科技支撑行动计划项目(202007);财政部和农业农村部:国家现代农业产业技术体系资助项目(CARS-19)。

摘　　要：为探究工艺、原料与茶叶中铅含量的关系以及信阳市茶叶中铅含量的安全程度,采集2013—2020年的193个茶叶样品进行检测分析,并采用目标危险系数(Target hazard quotient,THQ)模型来评价从茶叶中摄入铅的健康风险。结果显示,193个信阳市茶叶样品中,重金属铅的检出率为78.76%,所有样品中铅含量为0~4.98 mg/kg,铅平均含量为0.62 mg/kg,总体处于较低水平,所有检测样品铅均未超标。信阳红茶中铅的检出率高于信阳毛尖,信阳毛尖和信阳红茶铅含量、单芽茶和一芽一二叶茶中铅含量差异均不显著。成年男、女及儿童饮用信阳市茶叶时铅的目标危险系数分别为0~0.2358、0~0.2806、0~0.5407,即信阳市茶叶中的铅不会引起明显健康风险。In order to explore the relationship between technology,raw materials,and Pb content in tea,as well as the safety level of Pb content in tea in Xinyang City,193 tea samples were collected from 2013 to 2020 for testing and analysis,and the Target Hazard Quotient(THQ)model was used to evaluate the health risks of Pb intake from tea.The results showed that in 193 tea samples from Xinyang City,the detection rate of heavy metal Pb was 78.76%.The Pb content in all samples was 0~4.98 mg/kg,with an average Pb content of 0.62 mg/kg.The overall level was relatively low,and the Pb content in all test samples did not exceed the standard.The de⁃tection rate of Pb in Xinyang black tea was higher than that in Xinyang Maojian.There was no significant difference in Pb content be⁃tween Xinyang Maojian and Xinyang black tea,as well as between single bud tea and one-bud one/two-leaf tea.The target risk coeffi⁃cients for Pb consumption in Xinyang tea by adult men,adult women,and children were 0~0.2358,0~0.2806,and 0~0.5407,re⁃spectively,indicating that Pb in Xinyang tea didn’t pose significant health risks.

关 键 词：茶叶 铅 重金属污染 健康风险 信阳市 

分 类 号：TS272[农业科学—茶叶生产加工]