Using New Azo Derivative and Its Analytical Applications for Liquid-Liquid Extraction of Cobalt (II) Ion

The study of solvent extraction of Cobalt (II) ion by a new azo derivative of 8-Hydroxyquinolin (DPDQ), had been synthesized. Many effected parameters on the extraction process were studied. Solvent extraction is a mature technique in that extensive experience has led to a good understanding of the fundamental chemical reactions. At the same time, when compared with many other chemical separation processes like precipitation, distillation, or pyro metallurgical treatment, the large-scale application is solvent extraction. Parameters such as: acidity of the medium was found to be equal to pH of 10, the equilibrium time for the extraction was ten minutes, polarity of solvents showed the effectiveness of dielectric constant of solvents on extraction process, interference of some anion(s) and cation(s) effected on extraction,; optimum metal concentration that used in extraction method; effect of different salts such as: Sodium chloride, Sodium nitrate, etc. and effect of temperature which showed the stability of extracted complex at different temperatures were considered. The thermodynamic functions (∆H,∆G,∆S) were calculated and they showed that the reaction between the ligand and the metal ion was exothermic and spontaneous. The extraction stoichiometry was studied using two methods: Job's and Molar ratio. It was found to be (M: L) (1:2) the shape of complex was octahedral. The constant of stability of complex using the mole ration method was calculated. The spectroscopy of UV-visible, F.T.I. R, HNMR, CNMR, and mass were studied for both the reagent and complex in organic phase that identified the ligand and complex. Other physical constants such as melting point and conductivity were studied. Some biological species and drugs were used to extract Cobalt ion from its applications. From this research it was found the new ligand can be used to extract the Co2+ from biological and drug samples with good results.