SPECTROPHOTOMETRIC DETERMINATION OF Co(II) AS A COMPLEX WITH 1, 2 - PROPANEDIONE, 1- PHENYL - 1 (2 - HYDROXYL - 5 - BROMO - BENZILIDINEAZINE)-2-OXIME [PDPHBBAO]

The reagent was synthesized and characterization was carried out by FTIR, NMR, elemental analysis as well as Mass spectrometry. This reagent was then applied for the development of the analytical method for the extractive spectrophotometric determination of Cobalt (II). Cobalt metal forms yellow coloured complex, which can be extracted in chloroform at pH 9.0 having absorption maxima at 430 nm. Beer's law is obeyed in the concentration range 1-10 mu g. The molar absorptivity and Sandell's Sensitivity of the extracted species are found to be 5.8470 X 10(3) Lit mol(-1) cm(-1) and 10.088 X 10(-3) mu g / cm(2) respectively. The developed method is highly sensitive, selective, simple, rapid, accurate, and has been satisfactorily applied for the determination of cobalt in the synthetic mixtures, pharmaceutical samples, and alloys.