Cyclic Voltammetry
Hindawi Publishing Corporation
International Journal of Electrochemistry
Volume 2013, Article ID 849327, 7 pages http://dx.doi.org/10.1155/2013/849327 Research Article
Cyclic Voltammetric Investigation of Caffeine at Anthraquinone
Modified Carbon Paste Electrode
Yemane Tadesse,1 Abraha Tadese,2 R. C. Saini,2 and Rishi Pal3
1
Department of Chemistry, Arba Minch University, P.O. Box 21, Arba Minch, Ethiopia
Department of Chemistry, College of Natural and Computational Sciences, Mekelle University, P.O. Box 3055, Mekelle, Ethiopia
3
SBMN Institute of Pharm. Sciences and Research, Baba Mastnath University, Asthal-Bohar, Rohtak, Haryana 124021, India
2
Correspondence should be addressed to Yemane Tadesse; yemanet12@gmail.com and Abraha Tadese; abrishmu@yahoo.com
Received 17 September 2013; Revised 4 November 2013; Accepted 7 November 2013
Academic Editor: Sergio Ferro
Copyright © 2013 Yemane Tadesse et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Electrochemical methods have been widely used for the determination of electroactive compounds due to their simplicity, sensitivity, stability, and low cost. A carbon paste electrode was modified with anthraquinone. Cyclic voltammetry (CV) was employed to study the properties of the modified electrode toward the oxidation of caffeine (CAF). Compared to the unmodified electrode, the AQMCPE showed excellent catalytic activity for the oxidation of caffeine. AQMCPE was used to determine CAF in drug samples electrochemically. SWV was used to plot the calibration curve and there was a good linear relationship between anodic peak current and CAF concentration in the range 2.0 × 10−6 − 8.0 × 10–4 M, with the correlation coefficient of 0.998 and a detection limit of 1.43 × 10−7 M. The application of the modified electrode for the
International Journal of Electrochemistry
Volume 2013, Article ID 849327, 7 pages http://dx.doi.org/10.1155/2013/849327 Research Article
Cyclic Voltammetric Investigation of Caffeine at Anthraquinone
Modified Carbon Paste Electrode
Yemane Tadesse,1 Abraha Tadese,2 R. C. Saini,2 and Rishi Pal3
1
Department of Chemistry, Arba Minch University, P.O. Box 21, Arba Minch, Ethiopia
Department of Chemistry, College of Natural and Computational Sciences, Mekelle University, P.O. Box 3055, Mekelle, Ethiopia
3
SBMN Institute of Pharm. Sciences and Research, Baba Mastnath University, Asthal-Bohar, Rohtak, Haryana 124021, India
2
Correspondence should be addressed to Yemane Tadesse; yemanet12@gmail.com and Abraha Tadese; abrishmu@yahoo.com
Received 17 September 2013; Revised 4 November 2013; Accepted 7 November 2013
Academic Editor: Sergio Ferro
Copyright © 2013 Yemane Tadesse et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Electrochemical methods have been widely used for the determination of electroactive compounds due to their simplicity, sensitivity, stability, and low cost. A carbon paste electrode was modified with anthraquinone. Cyclic voltammetry (CV) was employed to study the properties of the modified electrode toward the oxidation of caffeine (CAF). Compared to the unmodified electrode, the AQMCPE showed excellent catalytic activity for the oxidation of caffeine. AQMCPE was used to determine CAF in drug samples electrochemically. SWV was used to plot the calibration curve and there was a good linear relationship between anodic peak current and CAF concentration in the range 2.0 × 10−6 − 8.0 × 10–4 M, with the correlation coefficient of 0.998 and a detection limit of 1.43 × 10−7 M. The application of the modified electrode for the
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