Open AccessVoltammetric Detection of Dopamine in Presence of Ascorbic Acid and Uric Acid at Poly (Xylenol Orange) Film-Coated Graphite Pencil Electrode
Author(s) -
Umesh Chandra,
B.E. Kumara Swamy,
Ongera Gilbert,
B.S. Sherigara
Publication year - 2011
Publication title -
international journal of electrochemistry
Language(s) - English
Resource type - Journals
eISSN - 2090-3537
pISSN - 2090-3529
DOI - 10.4061/2011/512692
Subject(s) - ascorbic acid , detection limit , electrode , horizontal scan rate , graphite , electrochemistry , redox , differential pulse voltammetry , xylenol orange , materials science , orange juice , analytical chemistry (journal) , uric acid , chemistry , nuclear chemistry , chromatography , inorganic chemistry , cyclic voltammetry , organic chemistry , biochemistry , food science
Poly (xylenol orange) film-coated graphite pencil electrode was fabricated for the detection of dopamine in the presence of ascorbic acid and uric acid in phosphate buffer solution of pH 7. The redox peaks obtained at modified electrode shows a good enhancement. The scan rate effect was found to be a diffusion-controlled electrode process. The electrochemical oxidation of dopamine was depended on pH, and the limit of detection was found to be 9.1 × 10−8 M. The simultaneous study gave and excellent result with great potential difference between dopamine and other bioactive organic molecules by using both cyclic voltammetric and differential pulse voltammetric techniques. The present modified graphite electrode was applied to the detection of dopamine in the injection samples, and the recovery obtained was satisfactory
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