Electrochemistry and Electrocatalysis of Electropolymerized Vitamin B1 Film Electrode
- VernacularTitle:维生素B1的电化学聚合及催化作用
- Author:
Qiuxia YANG
;
Yurong MA
;
Wei HE
;
Xuelin WANG
- Publication Type:Journal Article
- From:
Chinese Journal of Analytical Chemistry
2001;29(6):713-715
- CountryChina
- Language:Chinese
-
Abstract:
A polymer film of vitamin B1 was obtained at a graphite carbon electrode by cyclic voltammetric method in phosphate buffer solution (PBS). Cyclic voltammograms of the film electrode in PBS (pH 5) exhibited one pair redox waves, Epa=350 mV，Epc=325 mV，different from monomer vitamin B1. The peak currents of poly-VB1 films was proportional to (scan rate)1/2, which showed that the charge transfer was controlled by diffusion in the polymer film. The Poly-VB1 modified electrode showed a good catalytic ability to dopamine and epinephrine. At the modified electrod, the peak potential for oxidation of dopamine occurred at 250 mV and 200 mV for epinephrine, while they were shifted towards the negative direction 100 mV and 300 mV respectively at the bare glassy carbon electrode . And their peak current had a linear relationship to the concentrations in the range of 8.0×10-7～1.0×10-4 mol/L for dopamine and 1.0×10-6～1.0×10-4 mol/L for epinephrine.
