摘要
采用同位素示踪法对常见的18种食品及加工品中^(210)Po含量进行了测定,并对其所致内照射剂量进行了估算。结果表明:茶叶、香烟中^(210)Po比活度较高,分别为(16.1±0.5)、(29.9±1.0)Bq/kg(干重),表明这两种加工品对^(210)Po有较强的浓集作用;其余16种食品的可食部分中^(210)Po比活度约为0.029~4.78Bq/kg(鲜重)。依据测定的数据,估算出我国居民由食品摄入^(210)Po所致的年待积有效剂量约为95μSv/a,贡献相对较大的是粮食(37.7%)、蔬菜(28.8%)和水产品(27.1%)。
The concentration of ^210Po in 18 kinds of common foods and processed products were determined by isotope tracing method.Then the internal dose was estimated.Results show that ^210Po content in tea and cigarettes are higher,and are（16.1±0.5）,（29.9±1.0）Bq/kg（dry weight）respectively.These two creatures have strong enrichment ability on ^210Po.The remaining 16 kinds of food,^210Po content in the edible part are 0.029-4.78Bq/kg（fresh weight）.Based on the current measurement data,estimated annual effective dose of Chinese residents caused by food intake of ^210Po is about 95μSv/a,and relatively large contribution are grain（37.7%）,vegetables（28.8%）and aquatic products（27.1%）.
出处
《核化学与放射化学》
CAS
CSCD
北大核心
2016年第2期103-106,共4页
Journal of Nuclear and Radiochemistry
