Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12313/532
Title: Electrochemical sensors for dopamine using graphene-cobalt(II) complex modified glassy carbon electrode by adsorptive voltammetry
Authors: Cuadrado, Carol
Ibarra, Laura
Hurtado, John
García-Beltrán, Olimpo
Nagles, Edgar
Keywords: Dopamine
Uric acid
Human urine
Cobalt(II) complex
Adsorptive voltammetry
Graphene oxide
Issue Date: 15-Nov-2016
Publisher: Analytical and Bioanalytical Electrochemistry
Citation: Cuadrado, C., Ibarra, L., Hurtado, J., García-Beltrán, O., & Nagles, E. (2016). Electrochemical sensors for dopamine using graphene-cobalt(II) complex modified glassy carbon electrode by adsorptive voltammetry. Analytical and Bioanalytical Electrochemistry, 8(7), 910–921.
Abstract: [Co(bdmpzm)2(NCS)2] (bdmpzm=bis(3,5-dimethylpyrazol-1-yl)methane) was dispersed in graphene oxide (GOx). Composite GOx-[Co(bdmpzm)2(NCS)2] was deposited on a glassy carbon electrode (GCE) and reduced at -1.0 by 60 s. The modified electrode rGOx-[Co(bdmpzm)2(NCS)2]/GCE allowed the oxidation for dopamine (DA) at 0.41 V Our results showed reversible and sensitive process, (∆V 0.09 V) compared with the electrode without modified in buffer phosphate solution pH 3.0. The detection limit (3σ/b) for dopamine was 0.11 µmol L-1 and the RSD was 3.0%. The presence of uric acid and ascorbic acid did not interfere with the signal for dopamine.
URI: http://www.abechem.com/No.%207-2016/2016,%208(7),%20910-921.pdf
ISSN: 2008-4226
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