THE EXTRACTION-PHOTOMETRIC DETERMINATION OF COPPER(II) WITH 2,4-DINITROBENZOAZOPYROCATECHOL AND TRIPHENYLPHOSPHINE

N.Kh.Rustamov, U.N,Rustamova

The different-ligand complex of copper(II) with the organic reagent-2,4-dinitrobenzenazopyrocatecol and neutral ligand – triphenylphosphine have been investigated by spectrophotometric method. The optimal conditions of complexformation and extraction, the composition, physico-chemical and analytical properties of complex have been founded. The extraction-photometric method of determination of copper(II) has been developed. It has been established, that this method is high selective and it can be applied for determination of copper(II) in various natural and industrial materials. The method has been utilized for determination of copper(II) in ZnSO₄_× 7H₂O and NiSO₄× 7H₂O

Keywords : copper, triphenylposphine, 2,4-dinitrobenzolazopyrocatechol, extraction-photometric, organophosphorous compounds

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