Naslov
Electrochemical and Antioxidant Properties of Rutin

Autori
Medvidović-Kosanović, Martina ; Šeruga, Marijan ; Jakobek, Lidija ; Novak, Ivana

Izvornik
Collection of Czechoslovak chemical communications (0010-0765) 75 (2010), 5; 547-561

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
electrochemistry; adsorption; oxidations; rutin; antioxidant properties; TEAC assay

Sažetak
The mechanism of electrochemical oxidation of rutin on a glassy carbon electrode was studied at different pH by using several electrochemical techniques (cyclic, linear sweep, differential pulse and square-wave voltammetry) in order to give deeper insight into the mechanism of electrochemical oxidation of rutin and adsorption of its oxidation products on a glassy carbon electrode. It was determined that the rutin oxidation process on a glassy carbon electrode is reversible, pH dependent and includes the transfer of 2eand 2H+. The products of electrochemical oxidation strongly adsorb on the electrode surface. Maximum surface coverage, Γmax decreased with increasing scan rate from 3.4·10-9 mol cm-2 at scan rate 20 mV/s to 1.5·10-9 mol cm-2 at scan rate 100 mV/s and adsorption equilibrium constant was, log K = 4.57 ± 0.05. Antioxidant properties of rutin were investigated by TEAC (Trolox Equivalent Antioxidant Capacity) assay. It was found that the TEAC values of rutin depend on concentration and the EC50 value of rutin amounted 0.23.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA