Table of Contents
ISRN Analytical Chemistry
Volume 2014, Article ID 372576, 6 pages
Research Article

Characterization of Cr-Curcumin Complex by Differential Pulse Voltammetry and UV-Vis Spectrophotometry

Department of Chemistry, Morgan State University, Baltimore, MD 21251, USA

Received 8 July 2013; Accepted 16 September 2013; Published 4 March 2014

Academic Editors: B. N. Barman, P. Janos, and A. Szemik-Hojniak

Copyright © 2014 Maurice O. Iwunze. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Differential Pulse Voltammetry (DPV) and UV-Vis techniques were used in characterizing the complexation of chromium with curcumin. It was observed that chromium complexed with curcumin in a 1 : 3 ratio. The experimental values that were used to calculate this ratio were independently determined by the two techniques used. The values obtained from each technique agree with each other reasonably well, within limits of experimental error. The stability constant or formation constant, , of the complex, , was determined using the Lingane equation and Gibb’s free energy of formation was calculated as −58.18 kJ.