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| 210Po content in vegetables eaten by residents and estimation of internal exposure dose |
| ZHANG Zhuangzhuang, WEN Fuping, XU Xutao, LOU Hailin, PAN Jingshun, LI Xiaoyun, ZHENG Yifan |
| China Institute of Atomic Energy, Beijing 102413 China |
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Abstract Objective In order to investigate the radioactive level of 210Po in vegetables and evaluate its impact on residents.Method 14 types of vegetables such as leafy vegetables and fruit vegetables were purchased through the market. The activity concentration of 210Po in these vegetables was measured using a combination of wet digestion and silver flake self-deposition, and compared with reference values in related literatures, and the internal irradiation dose was estimated.Results Among the 14 kinds of vegetables selected in this research, the activity concentration range is 8.34×10-3 to 1.27 Bq/kg (fresh). The content of 210Po in shiitake mushrooms is 1.27 Bq/kg, which is higher than other vegetables. The content of 210Po in leafy vegetables is second, and the activity concentration range is 1.30×10-2～1.74×10-1 Bq/kg. The concentration range of tubers vegetables is from 1.77×10-2 to 3.5×10-2 Bq/kg, and the six fruit vegetables from 8.34×10-3 to 6.19×10-2 Bq/kg. It is estimated that the amount of 210Po ingested by residents through these vegetables is 24.3 Bq, resulting in an internal radiation dose of 29.2 μSv.Conclusion The radioactive level of 210Po in the vegetables in this investigation is normal and will not affect the health of residents.
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Received: 06 February 2020
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