Evaluation of Toxic and Trace Metals in Thai Fish by INAA

Abstract Fish and seafood may represent risks for human health since they are often contaminated by toxic elementts from aquatic environment, the magnitudes of which are magnified through the food chain. The purpose of this study was to analyze and evaluate the levels of toxic and trace metals in five species of fresh water fish and five species of marine fish bought from commercial markets in Bangkok, Thailand. The edible part of fish samples were analyzed by instrumental neutron activation analysis using the comparator techniques at Thai Research Reactor (TRR-1/M1) at the Thailand Institute of Nuclear Technology. The contents of As, Cd, Co, Cr, Fe, Hg, Rb, Sb, Sc, Se and Zn found in fish samples were 0.19-11.65,