Determination the concentrations of heavy metals in silver catfish (pangasiussp.) from Sungai Semantan and Sungai Tembeling / Dur Iffa Saparuddin

This study conducted to determine the concentration of heavy metal such as Cu,
Zn, Ni and Cd in the muscle of silver catfish (Pangasius sp.) collected from Sungai
Semantan and Sungai Tembeling. The fish feed and water samples were taken
from both sites that act as additional sources of metal accumulation in fish and to
assess the transfer factor.. The heavy metals in silver catfish and fish feed were
analysed by Energy Dispersive X-Ray Fluorescence (EDXRF) while the level of
heavy metals in water was analysed by Inductively Coupled Plasma-Mass
Spectrometry (lCP-MS). The highest and lowest concentrations of heavy metal
from both sites were zinc and nickel respectively. The concentration of heavy
metal in the fish from both site were in the increasing order for nickel, cadmium,
copper and zinc. Estimated daily intake (EDI) for selected heavy metal was below
the reference dose (RfD) for fish and the level for each heavy metal was below the
permissible limit set by FAO/WHO except cadmium. The values of transfer factor
indicate that the accumulated metal in fish is from water.