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http://dx.doi.org/10.5229/JECST.2014.5.1.23

Electrooxidation of DL-norvaline at Glassy Carbon Electrode: Approaching the Modified Electrode for Voltammetric Studies of Hydroquinone and Catechol  

Kamel, Mahmoud M. (Chemistry department, Faculty of science (Assiut), Al-Azhar University)
Publication Information
Journal of Electrochemical Science and Technology / v.5, no.1, 2014 , pp. 23-31 More about this Journal
Abstract
The DL-norvaline was electrochemically oxidized and deposited on the glassy carbon electrode surface using cyclic voltammetry (CV). The modified electrode was examined for electrochemical oxidation of hydroquinone (HQ) and catechol (CC). It exhibited good electrocatalytic ability towards their oxidation and simultaneous determination in a binary mixture using differential pulse voltammetry (DPV). The peak currents were linear to the concentration of HQ and CC, in the range from $5{\mu}M$ to $100{\mu}M$, and $4{\mu}M$ to $140{\mu}M$, respectively. The determination limits(S/N = 3) for HQ and CC were $1{\mu}M$ and $0.8{\mu}M$, respectively. The obtained modified electrode was applied to simultaneous detection of HQ and CC in water sample.
Keywords
DL-norvaline glassy carbon electrode; Hydroquinone; Catechol; Cyclic voltammetry; Differential pulse voltammetry;
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