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Sensors 2012, 12(4), 3916-3928; doi:10.3390/s120403916

Dithiooxamide Modified Glassy Carbon Electrode for the Studies of Non-Aqueous Media: Electrochemical Behaviors of Quercetin on the Electrode Surface

Department of Chemistry, Ahmet Keleşoğlu Education Faculty, Konya University, 42099 Konya, Turkey
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Received: 13 February 2012 / Revised: 13 March 2012 / Accepted: 14 March 2012 / Published: 26 March 2012
(This article belongs to the Section Chemical Sensors)
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Abstract

Electrochemical oxidation of quercetin, as an important biological molecule, has been studied in non-aqueous media using cyclic voltammetry, electrochemical impedance spectroscopy and scanning electron microscopy. To investigate the electrochemical properties of quercetin, an important flavonoid derivative, on a different surface, a new glassy carbon electrode has been developed using dithiooxamide as modifier in non-aqueous media. The surface modification of glassy carbon electrode has been performed within the 0.0 mV and +800 mV potential range with 20 cycles using 1 mM dithioxamide solution in acetonitrile. However, the modification of quercetin to both bare glassy carbon and dithiooxamide modified glassy carbon electrode surface was carried out in a wide +300 mV and +2,800 mV potential range with 10 cycles. Following the modification process, cyclic voltammetry has been used for the surface characterization in aqueous and non-aqueous media whereas electrochemical impedance spectroscopy has been used in aqueous media. Scanning electron microscopy has also been used to support the surface analysis. The obtained data from the characterization and modification studies of dithioxamide modified and quercetin grafted glassy carbon electrode showed that the developed electrode can be used for the quantitative determination of quercetin and antioxidant capacity determination as a chemical sensor electrode. View Full-Text
Keywords: electrochemical surface modification; electrochemical surface characterization; scanning electron microscopy; quercetin; dithiooxamide electrochemical surface modification; electrochemical surface characterization; scanning electron microscopy; quercetin; dithiooxamide
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Mülazımoğlu, A.D.; Yılmaz, E.; Mülazımoğlu, İ.E. Dithiooxamide Modified Glassy Carbon Electrode for the Studies of Non-Aqueous Media: Electrochemical Behaviors of Quercetin on the Electrode Surface. Sensors 2012, 12, 3916-3928.

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