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Electrochemical and Antioxidant Properties of (+)-Catechin, Quercetin and Rutin

Martina Medvidović-Kosanović   ORCID icon orcid.org/0000-0002-9887-9169 ; Department of Applied Chemistry and Ecology, Faculty of Food Technology, J. J. Strossmayer University of Osijek, Kuhačeva 18, P.O. Box 709, HR-31000 Osijek, Croatia
Marijan Šeruga ; Department of Applied Chemistry and Ecology, Faculty of Food Technology, J. J. Strossmayer University of Osijek, Kuhačeva 18, P.O. Box 709, HR-31000 Osijek, Croatia
Lidija Jakobek   ORCID icon orcid.org/0000-0002-4846-327X ; Department of Applied Chemistry and Ecology, Faculty of Food Technology, J. J. Strossmayer University of Osijek, Kuhačeva 18, P.O. Box 709, HR-31000 Osijek, Croatia
Ivana Novak ; Department of Applied Chemistry and Ecology, Faculty of Food Technology, J. J. Strossmayer University of Osijek, Kuhačeva 18, P.O. Box 709, HR-31000 Osijek, Croatia

Puni tekst: engleski, pdf (6 MB) str. 197-207 preuzimanja: 2.174* citiraj
APA 6th Edition
Medvidović-Kosanović, M., Šeruga, M., Jakobek, L. i Novak, I. (2010). Electrochemical and Antioxidant Properties of (+)-Catechin, Quercetin and Rutin. Croatica Chemica Acta, 83 (2), 197-207. Preuzeto s https://hrcak.srce.hr/56023
MLA 8th Edition
Medvidović-Kosanović, Martina, et al. "Electrochemical and Antioxidant Properties of (+)-Catechin, Quercetin and Rutin." Croatica Chemica Acta, vol. 83, br. 2, 2010, str. 197-207. https://hrcak.srce.hr/56023. Citirano 22.09.2019.
Chicago 17th Edition
Medvidović-Kosanović, Martina, Marijan Šeruga, Lidija Jakobek i Ivana Novak. "Electrochemical and Antioxidant Properties of (+)-Catechin, Quercetin and Rutin." Croatica Chemica Acta 83, br. 2 (2010): 197-207. https://hrcak.srce.hr/56023
Harvard
Medvidović-Kosanović, M., et al. (2010). 'Electrochemical and Antioxidant Properties of (+)-Catechin, Quercetin and Rutin', Croatica Chemica Acta, 83(2), str. 197-207. Preuzeto s: https://hrcak.srce.hr/56023 (Datum pristupa: 22.09.2019.)
Vancouver
Medvidović-Kosanović M, Šeruga M, Jakobek L, Novak I. Electrochemical and Antioxidant Properties of (+)-Catechin, Quercetin and Rutin. Croatica Chemica Acta [Internet]. 2010 [pristupljeno 22.09.2019.];83(2):197-207. Dostupno na: https://hrcak.srce.hr/56023
IEEE
M. Medvidović-Kosanović, M. Šeruga, L. Jakobek i I. Novak, "Electrochemical and Antioxidant Properties of (+)-Catechin, Quercetin and Rutin", Croatica Chemica Acta, vol.83, br. 2, str. 197-207, 2010. [Online]. Dostupno na: https://hrcak.srce.hr/56023. [Citirano: 22.09.2019.]

Sažetak
The electrochemical properties of three structurally different flavonoids ((+)-catechin, quercetin
and rutin) on a glassy carbon electrode were studied at different pH by cyclic, differential pulse and square-wave voltammetry. It was determined that in all investigated compounds oxidation of catechol 3',4'-dihydroxy group on the B-ring (the first oxidation peak) occurs. This process is reversible, pH dependent and includes the transfer of 2e− and 2H+. The products of electrochemical oxidation of all investigated flavonoids (especially of quercetin) strongly adsorb on the electrode surface. In terms of quantification, the absorbance value, proportional to the remaining ABTS+• concentration, is measured after a fixed reaction time. Results are expressed as Trolox equivalents (TEAC value), that is, as the concentration of Trolox solution (mmol dm−3) with an antioxidant capacity equivalent to that found for 1.0 mmol dm−3 of the substance under investigation. It was found that the TEAC values depend on the concentration of the investigated compounds. The activity sequence of the investigated, structurally different, flavonoids follows the sequence: quercetin > (+)-catechin > rutin.

Ključne riječi
flavonoids; electrochemistry; oxidation; antioxidant properties; TEAC assay

Hrčak ID: 56023

URI
https://hrcak.srce.hr/56023

Posjeta: 2.832 *