Electrocatalytic Properties of Dopamine and Uric Acid at Vitamin B1 Self-assembled Monolayer Gold Electrode
- VernacularTitle:维生素B1自组装膜修饰金电极对多巴胺、尿酸的电催化作用
- Author:
Qiuxia YANG
;
Guobao LI
;
Ying ZHANG
- Publication Type:Journal Article
- Keywords:
Vitamin B1;
self-assembled monolayer;
dopamine;
uric acid;
electrocatalysis;
chemically modified electrode
- From:
Chinese Journal of Analytical Chemistry
2009;37(7):1004-1008
- CountryChina
- Language:Chinese
-
Abstract:
Vitamin B1 self-assembled monolayer modified electrode (VB1-Au/SAMs/CME) was prepared and its electrochemical behavior was studied by cyclic voltammetry. The results showed that a self-assembled monolayer (SAM) was formed on the surface of gold electrode. \3-/4-redox couple was used as the electrochemical probe to study the electrochemical characteristics of SAM modified gold electrode and the results indicated that the existence of Vitamin B1 membrane on gold surface hindered the electron transfer. The electrochemical behaviors of dopamine(DA) and uric acid (UA) were investigated at VB1-Au/SAMs/CME. The results showed that the electrochemical oxidation of DA and UA could be electrocatalyzed. There were linear relationships between the anodic peak current and the concentration of DA(8.0×10-6-4.0×10-4 mol/L) and UA (6.0×10-5-2.2×10-4mol/L) respectively in differential pulse voltammograms. This modified electrode was effective to detect DA and UA in simultaneous determination of these species in a mixture.
