Abstract
3-Hydroxy-2-methyl-1,4-naphthoquinone-immobilized silica gel has been used for the adsorption and estimation of copper, cobalt, iron and zinc by both batch and column techniques. The distribution coefficient D determined for each metal ion was as follows (ml g 1): Fe, 3.6 × 10 2; Cu, 3.9 × 10 2; Co, 3.8 × 10 2; Zn, 4.1 × 10 2. Methods have been developed to estimate zinc, copper and cobalt in milk, steel and vitamin samples respectively.
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