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

Abstract

Research on Concentration of Heavy Metals (As, Cd, Li, Ni, Pb, Ti) in tilapia fish (Oreochromis sp.) from Sleman and Bantul and The Food Safety Level was studied. The aims of this research were to determine heavy metals concentration in tilapia fish, discover the correlations between metal and morphometric factors in tilapia fish, and determine food safety level intake of tilapia fish to be consumed per week. Determining metal concentrations in tilapia fish were using ICP-MS instrument, which the samples were dried using freeze dryer and destructed using microwave digester. The concentrations obtained were utilized to determine correlations between metal and morphometric factors, and measure Maximum Weekly Intake, Maximum Tolerable Intake, and food safety level intake per week. Based on research, the results showed 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 was Ti, As, Ni, Pb, Cd, Li. Concentration of As metal shows higher content than the threshold limit standards. Heavy metal accumulation was found in tilapia body that has positive and negative correlations between As metal and morphometrics in tilapia fish. Based on the measurement, food safety level intake tilapia fish for one adult is 1096 fish/week.