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Amperometric Kinetics of Hydrogen Peroxide Biosensor Bound with Natural Rubber  

Rhyu, Keun-Bae (Division of Natural Sciences, Cheongju University)
Yoon, Kil-Joong (Division of Natural Sciences, Cheongju University)
Publication Information
Applied Chemistry for Engineering / v.21, no.6, 2010 , pp. 689-693 More about this Journal
Abstract
When natural rubber dissolved in toluene comes into use as a binder of carbon powder, the volatilization of solvent just after the construction of biosensor brought the mechanical robustness on the paste. This characteristic satisfied the pre-requisite condition for the practical use of carbon paste electrode and a biosensor for the determination of hydrogen peroxide was designed. In order to evaluate its electrochemical qualitative and quantitative behaviors, various electrochemical kinetic parameters of the electrode, e.g. the symmetry factor (${\alpha}$, 0.37), the exchange current density ($i_0$, $0.075mAcm^{-2}$), the capacitance of double layer ($C_d$, $9.7{\times}10^{-3}F$), the time constant (${\tau}_A$, 0.92 s), the maximum current ($i_{max}$, $5.92{\times}10^{-7}Acm^{-2}$), the Michaelis constant ($K_M$, $1.99{\times}10^{-3}M$) and others were investigated. Results show that natural rubber is a promising binder of carbon powder.
Keywords
natural rubber; enzyme electrode; peroxidase; hydrogen peroxide; biosensor;
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