摘要：Activation analysis was applied for quantitative determination of mercury in hair and the data obtained were compared with those by colorimetric method using dithizone. The analyses of the materials sampled from individuals residing in Japan and in other countries were performed and it was found that the non-destructive analysis is a desirable method for the purpose in giving accurate results even for the samples which are unsuitable for the colorimetic analysis because of the small contents of mercury, and especially when a lot of samples are to be analysed within a limited time. The distributions of mercury along the length of long hairs obtained from "Minamata diseased" patients and thir families in Niigata prefecture were determined by non-destructive method and interesting results were obtained.
