Poly(3-thiophenemalonic acid) Modified Glassy Carbon Electrode for Selective Determination of Dopamine and Urine Acid in the Presence of Ascorbic Acid

A polymerized film of 3-thiophenemalonic acid (3-TPA) was prepared on the surface of glassy carbon electrode (GCE) in neutral solution by cyclic voltammetry (CV). The poly(3-TPA) film-coated GCE exhibited excellent electrocatalytic activity toward the oxidation of dopamine (DA) and uric acid (UA). T...

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Bibliographic Details
Published in:International journal of electrochemical science 2012-12, Vol.7 (12), p.12955-12962
Main Authors: Wan, Jia, Xu, Guang-Ri, Liu, Zhangsuo
Format: Article
Language:English
Subjects:
3-thiophenemalonic acid
dopamine
polymerized film
selective detection
uric acid
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Summary:A polymerized film of 3-thiophenemalonic acid (3-TPA) was prepared on the surface of glassy carbon electrode (GCE) in neutral solution by cyclic voltammetry (CV). The poly(3-TPA) film-coated GCE exhibited excellent electrocatalytic activity toward the oxidation of dopamine (DA) and uric acid (UA). This work provides a simple and easy approach to selective detection of DA and UA in the presence of AA. The detection limits of 2.60×10-7 and 5.20×10-7 M for DA and UA, respectively, were obtained by DPV method in pH 6.86 PBS. Additionally, the proposed methods can be successfully applied to the detection of DA in human urine samples.
ISSN:1452-3981
1452-3981
DOI:10.1016/S1452-3981(23)16599-0