Premium
Dopamine Detection Using the Selective and Spontaneous Formation of Electrocatalytic Poly(dopamine) Films on IndiumTin Oxide Electrodes
Author(s) -
Kim ByungKwon,
Son Seonhye,
Lee Kwangyeol,
Yang Haesik,
Kwak Juhyoun
Publication year - 2012
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.201100632
Subject(s) - ascorbic acid , indium tin oxide , dopamine , electrode , electrochemistry , detection limit , hydrazine (antidepressant) , inorganic chemistry , chemistry , oxide , indium , electrocatalyst , redox , materials science , chromatography , organic chemistry , food science , neuroscience , biology
In this study, we report the simple and sensitive electrochemical detection of dopamine in the presence of excess ascorbic acid. The detection is based on the spontaneous formation of electrocatalytic poly(dopamine) films on bare indiumtin oxide (ITO) electrodes. The poly(dopamine) films are formed by immersing ITO electrodes in a solution of dopamine and ascorbic acid for 10 min. Afterwards, the electrocatalytic oxidation of hydrazine is measured using modified electrodes. The electrooxidation current of hydrazine increases with increasing dopamine concentration. This method allows a detection limit of 1 nM for dopamine in the presence of 100 µM of ascorbic acid.