Electrochemical Oxidation of Sanguinarine and of Its Oxidation Products at a Glassy Carbon Electrode - Relevance to Intracellular Effects

2009 ◽  
Vol 22 (1) ◽  
pp. 113-120 ◽  
Author(s):  
Victor Constantin Diculescu ◽  
Teodor Adrian Enache ◽  
Paulo Jorge Oliveira ◽  
Ana Maria Oliveira-Brett
Keyword(s):  
Electrochemical Oxidation ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Oxidation Products ◽  
Carbon Electrode

Electrochemical Oxidation of Berberine and of Its Oxidation Products at a Glassy Carbon Electrode

2009 ◽  
Vol 21 (9) ◽  
pp. 1027-1034 ◽  
Author(s):  
Victor C. Diculescu ◽  
Teodor Adrian Enache ◽  
Paulo J. Oliveira ◽  
Ana Maria Oliveira-Brett
Keyword(s):  
Electrochemical Oxidation ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Oxidation Products ◽  
Carbon Electrode

Electrochemical and antioxidant properties of rutin

2010 ◽  
Vol 75 (5) ◽  
pp. 547-561 ◽  
Author(s):  
Martina Medvidović-Kosanović ◽  
Marijan Šeruga ◽  
Lidija Jakobek ◽  
Ivana Novak
Keyword(s):  
Electrochemical Oxidation ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Electrochemical Techniques ◽  
Antioxidant Properties ◽  
Differential Pulse ◽  
Oxidation Products ◽  
Trolox Equivalent Antioxidant Capacity ◽  
Carbon Electrode ◽  
Scan Rate

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 2 e– and 2 H+. 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–1 to 1.5 × 10–9 mol cm–2 at scan rate 100 mV s–1 and adsorption equilibrium constant was log K = 4.57 ± 0.05. Antioxidant properties of rutin were investigated by a Trolox equivalent antioxidant capacity (TEAC) assay. It was found that the TEAC values of rutin depend on concentration and the EC50 value of rutin amounted 0.23.

Electrochemical Oxidation at a Glassy Carbon Electrode of the Anti‐Arrhythmia Drug Disopyramide

2007 ◽  
Vol 40 (15) ◽  
pp. 2860-2871 ◽  
Author(s):  
Victor C. Diculescu ◽  
Teodor Adrian Enache ◽  
Ana Maria Oliveira‐Brett
Keyword(s):  
Electrochemical Oxidation ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Carbon Electrode
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