| GUO Yicao,HUANG Jialin,LIU Xiaolian.Natural radionuclides in mineral water and their internal dose to residents of Guangdong Province[J].Chinese Journal of Radiological Medicine and Protection,2000,20(2):132-135 |
| Natural radionuclides in mineral water and their internal dose to residents of Guangdong Province |
| Received:February 10, 1999 |
| DOI： |
| KeyWords:Mineral water Radioactivity Dose |
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| Abstract:: |
| Objective To research the contents of natural radionuclides in mineral water and their internal dose to residents of Guangdong Province. MethodsSpectrophotofluorometry,spectrophotometry,atomic absorption spectrophotometry and scintillation chamber method were used to determine the radionuclides in mineral water. Results The mean concentration of 226 Ra, natural uranium,natural thorium, 40 K,and radon in mineral water were 68. 6 mBq·L -1,2. 14 μg·L -1 、0. 65 μg·L -1,0. 199 Bq·L -1 and 209 8 Bq·L -1, respectively.The committed equivalent dose resulting from ingesting natural radionuclides in mineral water was estimated to be 0. 932 mSv·a -1,and the dose caused by intake of radon was 0. 919 mSv·a -1,accounting for approximately 99 per cent of the total dose. Conclusion The dose contributed by drinking mineral water is triple or quadruple that by public exposure in normal background areas, and is close to the annual dose limits of continuous and long term exposure. |
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