Essential Elements, Cadmium, and Lead in Raw and Pasteurized Cow and Goat Milk

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Abstract
Fifteen essential elements [Ca, Cl, Cr, Co, Cu, Fe, Mg, Mn, Mo, Ni, P, K, Na, Sn, Zn] plus Cd and Pb were determined in raw and pasteurized cow and goat milks by atomic absorption spectrophotometry. When results were compared on a wet weight basis, there were no significant differences between the raw and pasteurized milks except for Co, Fe, and Pb in goat milk. When Cu in goat milk was expressed on a dry weight basis, there was a significant difference between raw and pasteurized milk. There were significantly higher amounts of Co, Cu, Fe, Pb, Mg and P, wet weight basis, in pasteurized goat milk than in pasteurized cow milk. Significantly more Ni and Na were in pasteurized cow milk. No difference in the content of Cl, Ca, K and Zn was significant between the 2 milks. When dry weights of the 2 milks were compared, statistical differences were the same, except there was significantly more Ca and K in pasteurized cow milk than in pasteurized goat milk, and there were no significant differences in the content of Pb and P between the 2 milks. Percentages of the established and estimated recommended daily allowances show both cow and goat milk to be excellent sources of Ca, P and K, and fair sources of Fe, Mg and Na.