Determination of arsenic and mercury in longtail tuna (Thunnus tonggol) collected from Terengganu waters: risk assessment of dietary exposure

Despite the beneficial aspect of fish consumption, bioaccumulation toxic metals such as arsenic (As) and mercury (Hg) can enhance health risk for consumers. Arsenic Hg concentrations were measured in edible tissue two targeted organs, namely gill liver longtail tuna species (Thunnus tonggol) from Terengganu waters, including Kuala Besut, Terengganu, Dungun Kemaman. The concentration As analysed by using inductively coupled plasma-mass spectrometry. mean both elements significantly different (p < 0.05) among locations organs. hierarchy muscle samples > Besut Kemaman Terengganu. all samples, muscle, exceeded permitted level set Malaysia Food Act. Estimate Weekly Intake (EWI) was conducted to assess effect, 63 kg used average body weight Malaysian adults. However, EWI values show that weekly intake does not exceed provisional tolerable limit suggested Agricultural Organization United Nations is considered safe be consumed.