Original scientific paper
https://doi.org/10.5599/jese.2014.0064
Novel electroanalysis of hydroxyurea at glassy carbon and gold electrode surfaces
Keerti M. Naik
; P. G. Department of Studies in Chemistry, Karnatak University, Dharwad 580 003, India
Sharanappa T. Nandibewoor
; P. G. Department of Studies in Chemistry, Karnatak University, Dharwad 580 003, India
Abstract
A simple and a novel electroanalysis of hydroxyurea (HU) drug at glassy carbon and gold electrode was investigated for the first time using cyclic, linear sweep and differential pulse voltammetric techniques. The oxidation of HU was irreversible and exhibited a diffusion controlled process on both electrodes. The oxidation mechanism was proposed. The dependence of the current on pH, the concentration, nature of buffer, and scan rate was investigated to optimize the experimental conditions for the determination of HU. It was found that the optimum buffer pH was 7.0, a physiological pH. In the range of 0.01 to 1.0 mM, the current measured by differential pulse voltammetry showed a linear relationship with HU concentration with limit of detection of 0.46 µM for glassy carbon electrode and 0.92 µM for gold electrode. In addition, reproducibility, precision and accuracy of the method were checked as well. The developed method was successfully applied to HU determination in pharmaceutical formulation and human biological fluids. The method finds its applications in quality control laboratories and pharmacokinetics.
Keywords
Hydroxyurea; voltammetry; glassy carbon electrode; gold electrode; electroanalysis; oxidation
Hrčak ID:
127266
URI
Publication date:
22.9.2014.
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