Abstract
Bone samples were obtained from 65 Beijing residents who had died from illness or old age. The concentration of uranium in the bone ash was determined by the laser-fluorimetric method. The concentration varied between 0.014 and 0.390 μg g −1 ash, with a median value of 0.067 μg g −1 ash: the 25th and 75th percentiles were 0.045 and 0.1 μg g −1 ash respectively. The arithmetic mean was 0.083 μg g −1 ash. The concentration of uranium in bone (ash) correlated with age, but not with sex; uranium participates in the bone calcification process.
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