Voltammetric and Polarographic Studies of Eriochrome Black T - Nickel(II) Complex

Authors

OSMAN ÇAKIR
EMİNE ERTÜRK COŞKUN
ENDER BİÇER
SEMİHA ÇAKIR

DOI

-

Abstract

The electrochemical behaviour of complexes of Eriochrome Black T (EBT) with Ni(II) was studied. It was observed that EBT forms 1:1 and 1:2 complexes with Ni(II) in 0.1 M phosphate buffer at pH 6.0 by using Square-wave voltammetry (SWV), Cyclic voltammetry (CV), Direct Current Polarography (Sampled DCP) and Controlled Potential Coulometry (CPC). It was found that the reduction processes of Ni(II)-EBT complexes are irreversible. The stability constants of the Ni(II)-EBT complexes were evaluated with the DeFord-Hume procedure at different ligand concentrations using SWV. The logarithm values of stability constants of 1:1 and 1:2 Ni(II)-EBT complexes are 8.17 and 11.17, respectively.

Keywords

Eriochrome Black T-Ni(II) complex, voltammetry and polarography.

First Page

33

Last Page

38

Recommended Citation

ÇAKIR, OSMAN; COŞKUN, EMİNE ERTÜRK; BİÇER, ENDER; and ÇAKIR, SEMİHA (2001) "Voltammetric and Polarographic Studies of Eriochrome Black T - Nickel(II) Complex," Turkish Journal of Chemistry: Vol. 25: No. 1, Article 4. Available at: https://journals.tubitak.gov.tr/chem/vol25/iss1/4