Sensors 2011, 11(2), 1328-1344; doi:10.3390/s110201328
Article

Carbon Paste Electrodes Made from Different Carbonaceous Materials: Application in the Study of Antioxidants

1 Department of Chemistry, Faculty of Sciences, Dunărea de Jos University of Galaţi, 800008 Galaţi, Romania 2 Condensed Matter Physics Department, Faculty of Science, University of Valladolid, 47011 Valladolid, Spain 3 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
(This article belongs to the Special Issue Bioinspired Sensor Systems)
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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.

AMA Style

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.

Chicago/Turabian Style

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.

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