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  Home > JCE Print > Journal of Chemical Education > Issues > 2008  > January  >
In the Laboratory
Electroanalytical and Spectroscopic Studies of Poly(2,2′-bithiophene)-Modified Platinum Electrode To Detect Catechol in the Presence of Ascorbic Acid
Suzanne K. Lunsford, Nicole Speelman, Jelynn Stinson, Amber Yeary, and Hyeok Choi
Department of Chemistry, Wright State University, Dayton, OH 45435

Justyna Widera
Department of Chemistry, Adelphi University, Garden City, NY 11530-0701

Dionysios D. Dionysiou
Department of Civil and Environmental Engineering, University of Cincinnati, Cincinnati, OH 45221-0071

Cover
January 2008
Vol. 85 No. 1
p. 128
Abstract
This article describes an undergraduate laboratory for an instrumental analysis course that integrates electroanalytical chemistry and infrared spectroscopy. Modified electrode surfaces are prepared by constant potentiometric electrolysis over the potential range of 1.5–1.8 V and analyzed by cyclic voltammetry and infrared spectroscopy. The students learned how to prepare a poly(2,2′-bithiophene)-modified platinum sensor electrode for the detection of catechol in the presence of ascorbic acid. The peak separation in the cyclic voltammograms and the shifts of the IR peaks are used to assess the quality of the modified electrode.
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Citation
Lunsford, S. K.; Speelman, Nicole; Stinson, Jelynn; Yeary, Amber; Widera, Justyna; Choi, Hyeok; Dionysiou, Dionysios D. J. Chem. Educ. 2008, 85, 128.
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Keywords
Alcohols; Analytical Chemistry; Electrochemistry; Hands-On Learning / Manipulatives; Instrumental Methods; IR Spectroscopy; Laboratory Instruction; Natural Products; Upper-Division Undergraduate
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History
Created:
Last Updated:
12/4/2007
12/12/2007
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  Home > JCE Print > Journal of Chemical Education > Issues > 2008  > January  > Page 128


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