Normal concentration and excretion ratio of uranium in serum of normal individuals in India.

This paper reports the normal concentration of uranium in the blood serum of 12 normal volunteers from the Bombay, India area who had no occupational exposure to uranium. Serum samples were analyzed by neutron activation, radiochemical separation, and gamma counting. The mean and median uranium concentrations obtained in the present study are 14 and 13 ng L-1, respectively. The median value was used to obtain the excretion ratio of 41% for uranium excreted in urine compared to that present in the blood serum pool.