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%).