食品及加工品中~(210)Po含量测定及内照射剂量估算

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%)。

Determination of 210Po in Food and Processed Products and Estimation of Internal Dose

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 0.029-4.78 Bq/kg (fresh weight). Based on the current measurement data, estimated annual effective dose of Chinese residents caused by food intake of ²¹⁰Po is about 95 μSv/a, and relatively large contribution are grain (37.7%), vegetables (28.8%) and aquatic products (27.1%).