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Electrochemically Degraded Dopamine Film for the Determination of Dopamine
Author(s) -
Chang HyeYoung,
Kim Dong Il,
Park Yu Chul
Publication year - 2006
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.200503536
Subject(s) - ascorbic acid , detection limit , electrode , glassy carbon , electrochemistry , dopamine , materials science , reproducibility , voltammetry , analytical chemistry (journal) , cyclic voltammetry , square wave , chemistry , chromatography , physics , food science , voltage , neuroscience , quantum mechanics , biology
A dopamine (DA) polymer was deposited electrochemically on to a glassy carbon (GC) surface until the electrode surface was passivated. The DA film on the GC surface was re‐formed for high sensitivity and reproducibility by electrochemical degradation. The re‐formed electrode was sensitive and selective in the determination of DA in the presence of ascorbic acid. The linear range obtained by square‐wave voltammetry was between 0.1 and 2.1 μM ( R =0.996, n =6) with a sensitivity of 1.2 μA μM −1 and a detection limit ( S / N =3) of 0.04 μM. The electropolymerized DA film was stable and the re‐formed electrode was reproducible for DA determination.