Frequency of concentrations of some trace elements in scalp hair by INAA

126 samples of scalp hair from inhabitants of Central Bohemia, Czechoslovakia, were analyzed for content of zinc, cobalt, cesium, chromium, scandium, selenium, and iron, for the purpose of medical research. Simultaneous determination of the elements was made by INAA. Inorganic standards were used for calculation of concentrations of elements. Quality assurance was checked by IAEA certified reference material and by internal standard mixed human serum. Statistical results are expressed in ppm or ppb. Both normal and, if necessary, log-normal distributions of elements are presented, and types of distribution curves are verified statistically on 95% level of probability. (author) 22 refs.; 3 tabs