我国边销茶中稀土元素含量水平调查及成年消费人群的暴露风险评估  

Exposure assessment of rare earth elements in brick tea among Chinese adults

作　　者：宋雁[1] 刘兆平[1] 张磊[1] 隋海霞[1] 毛伟峰[1] 包汇慧[1] 雍凌[1] 李宁 

机构地区：[1]国家食品安全风险评估中心卫生部食品安全风险评估重点实验室,北京100022

出　　处：《中国食品卫生杂志》2016年第2期249-253,共5页Chinese Journal of Food Hygiene

基　　金：国家自然科学基金青年基金项目(81402683)

摘　　要：目的初步掌握我国边销茶中稀土元素含量水平,评估我国边销茶成年消费人群中稀土元素暴露水平及其潜在的健康风险。方法用GB 5009.94—2012《植物性食品中稀土元素的测定》中推荐的电感耦合等离子体质谱法对边销茶中稀土元素含量进行测定,采用24 h回顾法对我国边销茶消费地区成年人群的边销茶消费状况进行调查,通过简单分布评估法计算边销茶成年消费人群中稀土元素暴露水平并进行风险评估。结果边销茶中稀土元素总体超标率为74%（67/90）,含量范围为0.10～10.35 mg/kg,平均含量为3.41 mg/kg,中位数为3.10 mg/kg,其中稀土元素铈、镧、钇、钕的平均含量相对较高,分别为0.74、0.43、0.35、0.30 mg/kg。我国边销茶成年消费人群通过饮用边销茶摄入的稀土元素每日平均暴露量为0.668μg/kg BW,占ADI的1.13%;高边销茶成年消费人群（P95）稀土元素每日暴露量为2.302μg/kg BW,占ADI的3.90%。16种稀土元素中,铈、镧、钇、钕的每日平均暴露量相对较高,分别为0.178、0.104、0.082、0.073μg/kg BW,占总稀土元素暴露量的65%。结论目前我国边销茶成年消费人群中稀土元素摄入水平对人群健康造成的风险处于可以接受水平,健康风险较低。Objective To study the rare earth elements（REEs）concentration level in brick tea,and evaluate REEs dietary intake level and potential health risks in brick tea in Chinese adults.Methods The concentrations of REEs in brick tea samples were detected by inductively coupled plasma mass spectrometry（ICP-MS）.The consumption of brick tea in Chinese adults was investigated in 2014-2015 by 24 hour dietary retrospective method.Based on the deterministic assessment model,the dietary intake of REEs in brick tea by Chinese adults was calculated.Results The violation rate of REEs in brick tea was 74%,the range of concentration was 0.10-10.35 mg/kg,the average was 3.41 mg/kg,and the median was 3.10 mg/kg.The average concentrations of Ce,La,Y,and Nd（0.74,0.43,0.35,and 0.30 mg/kg,respectively）were higher than the other 13 REEs.In brick tea consumption population,average exposure of REEs was0.668 μg/kg BW,only accounting for 1.13% of ADI.The high consumption（P95）exposure of REEs was 2.302 μg/kg BW per day,accounting for 3.90% of the ADI.The average exposure of Ce,La,Y and Nd（0.178,0.104,0.082 and0.073 μg/kg BW,respectively）was higher than the other 13 REEs,almost accounting for 65% of the total REEs exposure.Conclusion The exposure of REEs in brick tea by Chinese adults was considerably below the ADI and any health risk that would be expected to occur at this exposure level was negligible.

关 键 词：边销茶 稀土元素 简单分布评估 暴露水平 风险评估 食品污染物 

分 类 号：TS272.7[农业科学—茶叶生产加工]