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Electro-catalyzed oxidation of reduced glutathione and 2-mercaptoethanol by cobalt phthalocyanine-containing screen printed graphite electrodes |
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| Authors: | Nthapo Sehlotho, Sophie Griveau, Nadine Ruill , Mohammed Boujtita, Tebello Nyokong,Fethi Bedioui |
| Affiliation: | aINSERM,U640,CNRS,UMR8151,Ecole Nationale Supérieure de Chimie de Paris, René Descartes Paris 5, Chemical and Genetic Pharmacology Laboratory, Paris, France bDepartment of Chemistry, Rhodes University, Grahamstown 6140, South Africa cGroupe Méthodologie Electrochimique—LAIEM, UMR CNRS 6006—FCMN, FR-CNRS 2465—Université de Nantes, 2 rue de la Houssinière, B.P. 92208, 44322 Nantes Cedex 03, France |
| Abstract: | Electro-catalytic behavior of screen printed graphite electrodes modified with cobalt phthalocyanine (CoPc) towards the oxidation of reduced glutathione (GSH) and 2-mercaptoethanol (2-ME) is reported. We find, by using cyclic voltammetry, that the oxidation of 2-ME occurs at 0.2 V vs Ag/AgCl and − 0.3 vs Ag/AgCl V at pH = 7 and pH = 13, respectively and that of GSH occurs at 0.4 V vs Ag/AgCl and 0.0 V vs Ag/AgCl at pH = 7 and 13, respectively. The electro-catalytic activity depends on the method of electrode modification and the amount of catalyst incorporated in the ink used to fabricate the SPCEs. The highest activity was obtained with electrodes prepared with 2.5% (w:w) of CoPc. |
| Keywords: | Screen printed carbon electrodes Cobalt phthalocyanine Reduced glutathione 2-mercaptoethanol |
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