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Carbon Paste Electrodes Made from Different Carbonaceous Materials: Application in the Study of Antioxidants
Department of Chemistry, Faculty of Sciences, Dunărea de Jos University of Galaţi, 800008 Galaţi, Romania
Condensed Matter Physics Department, Faculty of Science, University of Valladolid, 47011 Valladolid, Spain
Department of Inorganic Chemistry, Escuela de Ingenierías Industriales, University of Valladolid, 47011 Valladolid, Spain
* Author to whom correspondence should be addressed.
Received: 23 December 2010; Accepted: 20 January 2011 / Published: 25 January 2011
Abstract: This work describes the sensing properties of carbon paste electrodes (CPEs) prepared from three different types of carbonaceous materials: graphite, carbon microspheres and carbon nanotubes. The electrochemical responses towards antioxidants including vanillic acid, catechol, gallic acid, L-ascorbic acid and L-glutathione have been analyzed and compared. It has been demonstrated that the electrodes based on carbon microspheres show the best performances in terms of kinetics and stability, whereas G-CPEs presented the smallest detection limit for all the antioxidants analyzed. An array of electrodes has been constructed using the three types of electrodes. As demonstrated by means of Principal Component Analysis, the system is able to discriminate among antioxidants as a function of their chemical structure and reactivity.
Keywords: carbon paste electrode; carbonaceous material; carbon nanotube; cyclic voltammetry; antioxidant
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MDPI and ACS Style
Apetrei, C.; Apetrei, I.M.; Saja, J.A.D.; Rodriguez-Mendez, M.L. Carbon Paste Electrodes Made from Different Carbonaceous Materials: Application in the Study of Antioxidants. Sensors 2011, 11, 1328-1344.
Apetrei C, Apetrei IM, Saja JAD, Rodriguez-Mendez ML. Carbon Paste Electrodes Made from Different Carbonaceous Materials: Application in the Study of Antioxidants. Sensors. 2011; 11(2):1328-1344.
Apetrei, Constantin; Apetrei, Irina Mirela; Saja, Jose Antonio De; Rodriguez-Mendez, Maria Luz. 2011. "Carbon Paste Electrodes Made from Different Carbonaceous Materials: Application in the Study of Antioxidants." Sensors 11, no. 2: 1328-1344.