Measurement of uranium in human teeth and kidney stones with the fission track technique

The measurement of uranium in human teeth and kidney stones has been carried out by using the fission track activation technique. In this determination 2759 and 2205 absolute counts of tracks /for standard: 6940 and 1556/ for teeth samples and 1689 tracks /for standard: 1446/ for kidney stone samples have been made, respectively. The results obtained by this technique are the following: X_tooth/1/=/0.227±0.006/ ppm, X_tooth/2/=/0.143±0.007/ ppm and X_kidney=/0.568±0.020/ ppm. The experimental method is described and the results discussed.