A new stable Fe (CN)6 3 - / 4 --immobilized poly(butyl viologen)-modified electrode for dopamine determination
Journal
Sensors and Actuators, B: Chemical
Journal Volume
137
Journal Issue
1
Pages
313-319
Date Issued
2009
Author(s)
Abstract
A new kind of highly stable Fe (CN)63 - / 4 -/poly(butyl viologen) (PBV) thin film, without any sealing layer, as a modified electrode for dopamine oxidation was proposed. In this work, Fe (CN)64 - were entrapped within the PBV film to form a charge transfer complex. The electrochemical and electrocatalytic properties were studied using cyclic voltammetry (CV) and amperometric techniques, in conjunction with a rotating-disk electrode. The results show a highly stable and symmetric redox behavior for the Fe (CN)63 - / 4 - couple with peak-peak separation of 3 mV at a scan rate of 5 mV/s. The electron transfer rate constant for the Fe (CN)63 - / 4 - couple within the film, the catalytic rate constant between dopamine and Fe (CN)63 - / 4 -, and the Michaelis-Menton constants are investigated. Moreover, the result shows an excellent mediation for dopamine oxidation. © 2008 Elsevier B.V. All rights reserved.
SDGs
Type
journal article