SILVER AND OTHER TRACE-ELEMENTS IN A FRESH-WATER FISH, CARASIUS-AURATUS-LANGSDORFII, FROM THE ASAKAWA RIVER IN TOKYO, JAPAN

The concentrations of silver (Ag) in a typical freshwater fish in Japa n, Carasius auratus langsdorfii, and some other species have been dete rmined to examine the Ag-contamination of fish and to specify the Ag a ccumulating species and part. They were dissected roughly into four pa rts, and analyzed by an instrumental neutron activation analysis. It w as found that Ag was accumulated in the samples from the Asakawa River , and that the Ag concentration in the entrails of C. auratus langsdor fii reached 12 mu g g(-1). The analysis of a C. auratus langsdorfii, w hich was dissected into 13 individual organs, showed that the Ag was a ccumulated highly in the liver, followed by the gallbladder and kidney . The inter-species and inter-part distributions of other trace elemen ts have also been studied. Copyright (C) 1996 Elsevier Science Ltd.