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Electrocatalytic Oxidation and Determination of Dopamine in the Presence of Ascorbic Acid and Uric Acid at a Poly (4‐(2‐Pyridylazo)‐Resorcinol) Modified Glassy Carbon Electrode
Author(s) -
Chen Jinghua,
Zhang Jing,
Lin Xinhua,
Wan Hongyan,
Zhang Shaobo
Publication year - 2007
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200603755
Subject(s) - ascorbic acid , detection limit , resorcinol , electrode , electrochemistry , chemistry , glassy carbon , inorganic chemistry , nuclear chemistry , linear range , chromatography , cyclic voltammetry , organic chemistry , food science
A sensitive and selective electrochemical method for the determination of dopamine (DA) was developed using a 4‐(2‐Pyridylazo)‐Resorcinol (PAR) polymer film modified glassy carbon electrode (GCE). The PAR polymer film modified electrode shows excellent electrocatalytic activity toward the oxidation of DA in a phosphate buffer solution (PBS) (pH 4.0). The linear range of 5.0×10 −6 –3.0×10 −5 M and detection limit of 2.0×10 −7 M were observed. Simultaneous detection of AA, DA and UA has also been demonstrated on the modified electrode. This work provides a simple and easy approach to selective detection of DA in the presence of AA and UA.