Determination of dopamine in the presence of ascorbic acid using poly(3,5-dihydroxy benzoic acid) film modified electrode |
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Authors: | Hou Shurong Zheng Na Feng Haiyan Li Xiangjun Yuan Zhuobin |
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Institution: | College of Chemistry and Chemical Engineering, Graduate University, Chinese Academy of Sciences, 100049 Beijing, China |
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Abstract: | A polymerized film of 3,5-dihydroxy benzoic acid (DBA) was prepared on the surface of a glassy carbon electrode (GCE) in neutral solution by cyclic voltammetry (CV). The poly(DBA) film-coated GCE exhibited excellent electrocatalytic activity toward the oxidation of dopamine (DA). A linear range of 1.0 × 10−7 to 1.0 × 10−4 M and a detection limit of 6.0 × 10−8 M were observed in pH 7.4 phosphate buffer solutions. Moreover, the interference of ascorbic acid (AA) was effectively eliminated. This work provides a simple and easy approach to selective detection of DA in the presence of AA. |
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Keywords: | Poly(3 5-dihydroxy benzoic acid) film modified electrode Electrocatalysis Dopamine Ascorbic acid |
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