The Presence of Arsenic as Heavy Metal Contaminant on Salmon : a Risk Assessment

Salmon is a kind of fish which has good nutrition for human but it can be contaminated by heavy metal such as arsenic. In risk assessment , the provisional tolerable weekly intake (PTWI) for inorganic arsenic is 15 μg/kg b.w./week and the organic forms of arsenic present in sea foods need different consideration from the inorganic arsenic in water. There are no reports of toxicity in man or animals from the consumption of organoarsenicals in seafood. Organic arsenic compounds such as arsenobetaine and arsenocholine seem not to be converted to inorganic arsenic in vivo and not genotoxic in mammalian cells in vitro. Therefore, arsenobetaine and arsenocholine from fish and sea food consumption is not considered to represent a significant