食品及加工品中<sup>210</sup>Po含量测定及内照射剂量估算

食品及加工品中²¹⁰Po含量测定及内照射剂量估算

摘要: 采用同位素示踪法对常见的18种食品及加工品中²¹⁰Po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²¹⁰Po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²¹⁰Po有较强的浓集作用；其余16种食品的可食部分中²¹⁰Po比活度约为0.029~4.78 Bq/kg（鲜重）。依据测定的数据，估算出我国居民由食品摄入²¹⁰Po所致的年待积有效剂量约为95 μSv/a，贡献相对较大的是粮食（37.7%）、蔬菜（28.8%）和水产品（27.1%）。

Abstract: 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%).