INVESTIGATION OF LEVELS OF SOME HEAVY METAL PRESENTS IN LIVESTIKE‟S WATER AND RAW MILK IN EAST GUJI ZONE, ETHIOPIA USING ATOMIC ABSORPTION SPECTROSCOPY

Abstract

In this work heavy metal concentration in row cow milk and live stock water in east Guji Zone were studied using FAAS. The Raw Cow’s milk and water were collected from six farms of Liben bulb, Liben, mugayo, Goro Dola Daraara, Goro Dola Haraqalo and, Wadera Lagu, Wadera Calo site Guji zone, Ethiopia and HNO3 was used in the optimal microwave digestion process to break down the milk and water samples. The heavy metal contents obtained using FAAS show slight different among six samples in cow milk and water. The concentration of Pb, Ni, Co, Cr and Cu were determined by using AAS. Pb, Ni, Co, Cr, and Cu were found in every sample of milk and water. The concentration of Pb, Ni, Co, Cr and Cu, 0.046 - 0.084 mg\L , 0.17 - 0.245, 0.0035 -0.097mg\L, 0.045 - 0.104 mg and 0.161 -0.473 mg\Lin milk and WHO of the above elements 0.04, 0.07, 0.05),0.05,2.0)in cow milk and the concentration of Pb ,Ni,Cr,Cu andCu,0.034- 0.084mg\L,0.134-0.344,0.034-0.295,0.045-0.104and0.026-0.094in water and The WHO above element, 0.01, 0.02, 2.0, 0.05, and 0.05 in water. The concentration Cu and Ni are more than Co, Cr, and Pb in both milk and water, concentrations are generally the lowest in milk and water.