Some determinations of Hg, As, Se, Sb, Sn and Br in water plants, sediments and fishes in Bavarian rivers

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Abstract
Neutron activation analysis with chemical separation after irradiation was applied to the determination of some toxic elements, especially Hg, As, Se, Sb, Sn and Br in Bavarian Rivers. The chemical separation was a distillation method earlier described by K. Samsahl. The sampling places were sometimes chosen near to some plastics factories, using chlorine alkali electrolysis. We found concentrations of mercury in plants of up to 250 ppm dry weight and concentrations of tin up to 3000 ppm. The upper level of arsenic in river sediments was about 40 ppm, whereas selenium was present in higher concentrations than the other elements in some fishes, e.g. up to 18 ppm in eel livers.