武汉市不同种类茶叶中9,10-蒽醌污染水平及膳食暴露  

Study on the contamination level and dietary exposure of 9,10-anthraquinone in different types of teas in Wuhan

作　　者：刘小红[1] 李永刚[1] 孔芳 聂晓明[1] 唐琳[1] 闻胜[1] 罗苹[1] LIU Xiaohong;LI Yonggang;KONG Fang;NIE Xiaoming;TANG Lin;WEN Sheng;LUO Ping(Hubei Provincial Key Laboratory for Applied Toxicology,Hubei Provincial Centre for Disease Control and Prevention,Wuhan 430079,China)

机构地区：[1]应用毒理湖北省重点实验室湖北省疾病预防控制中心,武汉430079

出　　处：《公共卫生与预防医学》2021年第3期45-49,共5页Journal of Public Health and Preventive Medicine

基　　金：国家重点研发计划(2017YFC1600500)。

摘　　要：目的了解武汉市售茶叶中9,10-蒽醌的污染水平,并对通过茶水摄入的9,10-蒽醌进行膳食暴露评估。方法用气相色谱-串联质谱法对武汉市茶叶市场销售的36份茶叶中的9,10-蒽醌含量进行检测。结果36份茶叶样品中均不同程度检出9,10-蒽醌,浓度范围为0.0080mg/kg~0.137 mg/kg,我们国家尚未设定9,10-蒽醌的限值,参考欧盟的标准,总体超标率为86.11%(31/36)。发酵程度越高的茶叶中残留的9,10-蒽醌也越高:其中全/后发酵茶中9,10-蒽醌浓度均值最高为0.0762 mg/kg,超标率为100%;其次为轻/半发酵茶,浓度均值为0.0452 mg/kg,超标率为86.7%;不发酵茶,浓度均值为0.0262 mg/kg,超标率为42.9%。根据人们的饮茶习惯,我们以1∶50的茶水比用沸水冲泡茶叶5分钟后,检测茶汤中9,10-蒽醌浓度为0.0004mg/kg~0.01mg/kg,平均浸出率为7.2%。根据膳食暴露风险评估公式计算,茶叶中9,10-蒽醌成人的日均暴露量为0.0551μg/kg bw/day。结论武汉市售茶叶中存在一定程度的9,10-蒽醌污染,且超标率较高。由于未制定9,10-蒽醌的每日容许摄入量(ADI),因此无法评估通过茶叶摄入的9,10-蒽醌对健康造成的风险。Objective To investigate the pollution level of 9,10-anthraquinone in teas sold in Wuhan,and to assess the dietary exposure of 9,10-anthraquinone ingested through tea.Methods The content of 9,10-anthraquinone in teas collected from local tea markets in Wuhan was analyzed by GC-MS/MS.Results 9,10-anthraquinone was detected in all 36 tea samples with a concentration ranging from 0.0080 mg/kg to 0.137 mg/kg.The standard limit for 9,10-anthraquinone has not yet been set in China.Referring to EU standards,the total over-standard rate was 86.11%(31/36).Generally,the concentration of residual 9,10-anthraquinone was higher in highly fermented teas.The highest average concentration of residual 9,10-anthraquinone was found in fully/post-fermented tea(0.0762 mg/kg),and the over-standard rate was 100%.The second highest was in semi-fermented tea(0.0452 mg/kg),and the over-standard rate was 86.7%.The concentration of 9,10-anthraquinone in non-fermented tea was 0.0262 mg/kg,and the over-standard rate was 42.9%.According to people’s tea-drinking habits,tea samples were brewed with boiling water(1∶50)for 5 minutes,and the concentration of 9,10-anthraquinone in tea souPwas 0.0004 mg/kg~0.01 mg/kg,with an average leaching rate of 7.2%.The average daily intake exposure of tea for an adult was 0.0551μg/kg bw/day.Conclusion There was a certain degree of 9,10-anthraquinone pollution in the teas sold in Wuhan,and the rate exceeding the standard was high.Since the acceptable daily intake(ADI)for 9,10-anthraquinone has not been established,it is impossible to assess the health risks of 9,10-anthraquinone ingested through tea.

关 键 词：茶叶 9 10-蒽醌 风险评估 

分 类 号：R181[医药卫生—流行病学]