Food Safety Level Assessment on Heavy Metals (As, Cd, Li, Ni, Pb, Ti) Concentration in Tilapia Fish (Oreochromis sp.) from Sleman and Bantul Yogyakarta

Research on concentration of heavy metals (As, Cd, Li, Ni, Pb, Ti) in tilapia fish (Oreochromis sp.) from Sleman and Bantul as well as the food safety level was studied. The aims of this research were to determine the heavy metal concentration in tilapia fish, to discover the correlation between metal and morphometric factors in tilapia fish, and to determine the food safety level intake of tilapia fish to be consumed per week. The metal concentration in tilapia fish was determined using ICP-MS, where the samples were dried using freeze dryer and destructed using microwave digester. The concentrations obtained were utilized to determine the correlation between metal and morphometric factors, and to measure the maximum weekly intake, the maximum tolerable Intake, and food safety level intake per week. The results showed that the order of metal accumulation in tilapia fish (Oreochromis sp.) from the largest to the smallest value for Bantul area was Ti, As, Ni, Pb, Li, Cd and for Sleman area was Ti, As, Ni, Pb, Cd, Li. The concentration of As was higher than the threshold limit standards. The heavy metal accumulation was found in tilapia body that had positive and negative correlations between As metal and morphometrics in tilapia fish. Based on the measurement, the food safety level intake tilapia fish for one adult was 1096 fish/week.