居民主要食品中210Po含量及所致公众内照射剂量估算  

Study on the contents of Po in food and estimation of the internal irradiation dose of residents

作　　者：刘庆云[1] 高鹏 杜娟[1] 宫增艳[1] LIU Qingyun;GAO Peng;DU Juan;GONG Zengyan(Beijing Radiation Safety Technology Center,Beijing 100089 China)

机构地区：[1]北京市辐射安全技术中心,北京100089

出　　处：《中国辐射卫生》2021年第1期28-33,共6页Chinese Journal of Radiological Health

摘　　要：目的调查居民膳食中放射性核素^(210)Po含量及所致公众内照射剂量水平。方法通过主要食品集散市场,采集肉类、蔬菜、水果、水产、谷类、奶类等50余种食品样品,使用湿式灰化和金属自沉积结合的方法测定食品样品中^(210)Po含量,并估算评价^(210)Po所致居民内照射剂量及其相对贡献。结果50余种食品中^(210)Po活度浓度为8.34 mBq/kg·鲜~16.9 Bq/kg·鲜,带鱼中^(210)Po含量较高,为16.9 Bq/kg·鲜,高于其他淡水鱼类。根据测定数据估算出居民^(210)Po年摄入量为108 Bq/人,^(210)Po所致成人年待积有效剂量为129μSv/a,贡献相对较大的是面类(15.2%)、蛋类(22.0%)、水产品(17.1%)、植物油(18.1%)。结论居民^(210)Po年摄入量低于现行标准中规定的成人^(210)Po年摄入量限值(2200 Bq)。Objective To investigate radioactive nuclide^(210)Po content in the diet of residents and internal irradiation dose caused by them.Methods The major food distribution market is selected,more than 50 kinds of food samples such as meat,vegetables,fruits,aquatic products,cereals,milk are collected,the combined method ofwet ashingand metal deposition is used to measure^(210)Po content of food samples,and analysis of monitoring data and estimationof irradiationexposure dose of residents caused by^(210)Po and their relative contribution are made.Results In the food samples,the specific activity of^(210)Po was 8.34 mBq/kg·fresh~16.9 Bq/kg·fresh,and the content of^(210)Po in hairtail was higher,its value was16.9 Bq/kg·fresh,which was higher than other freshwater fish.According to the data,the annual intake of residents was108 Bq/person,and the annual effective dose of adult caused by^(210)Po was 129μSv/a.The relatively large contribution were from flour(15.2%),eggs(22.0%),aquatic products(17.1%)and vegetable oil(18.1%).Conclusion The annual intake of^(210)Po for residents is lower than the current limit for adults of which the value is 2200 Bq.

关 键 词：食品 ^(210)Po 放射性含量 居民内照射剂量 

分 类 号：X591[环境科学与工程—环境工程]