Abstract

Sita Malhotra and Keemti Lal

Copper (II) and Cobalt (II) form coloured complexes with 3-bromo-2-hydroxy-5~acetophenone oxime (BHAMAO). The Chelates are quantitatively adsorbed on microcrystalline naphthalene at room temperature and adsorbed species are dissolved in dimethyl formamide. The Cu (II) and Co (II) are determined at the pH range 4.0-8.5 and 7.0-8.5 at λmax 400nm respectively. The system obeys Beer's law over the range 4.76-35.27 and 2-31 ppm for Cu(ll) and Co(II) respectively. The complexes have molar absorptivity 666 and 1190 1 mole-1 cm-1 while their sensitivity is 0.095 and 0.049 μg cm-1 while^their sensitivity is 0.095 and 0.049 μg cm-1 for 0.001 absorbance for Cu (II) and Co (II) respectively in DMF. It is found that the accuracy of the procedure is good and standard deviation did not exceed 2.0%.

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