Studies of the electrochemical behavior of epinephrine at a homocysteine self-assembled electrode

The self-assembled electrode with the homocysteine monolayer (Hcy/Au) has been characterized by infrared spectroscopy and ac impedance spectroscopy in electrolyte. The Hcy/Au electrode is demonstrated to promote the electrochemical response of epinephrine (E) by cyclic voltammetry. A pair of well-de...

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Bibliographic Details
Published in:Talanta (Oxford) 2002-04, Vol.56 (6), p.1081-1088
Main Authors: Zhang, Hui-Min, Zhou, Xian-Liang, Hui, Ru-Tai, Li, Nan-Qiang, Liu, De-Pei
Format: Article
Language:English
Subjects:
Biological and medical sciences
Cyclic voltammetry
Electrochemistry
Epinephrine
FT-IR spectroscopy
Fundamental and applied biological sciences. Psychology
Molecular biophysics
Physical chemistry in biology
Self-assembled electrode
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Summary:The self-assembled electrode with the homocysteine monolayer (Hcy/Au) has been characterized by infrared spectroscopy and ac impedance spectroscopy in electrolyte. The Hcy/Au electrode is demonstrated to promote the electrochemical response of epinephrine (E) by cyclic voltammetry. A pair of well-defined redox waves was obtained and the calculated standard rate constant ( k s) is 2.1×10 −2 cm s −1 at the self-assembled electrode. The reduction peak of E can be used to determine the concentration of E in presence of ascorbic acid (AA) owing to the Hcy/Au also promoting the electrochemical oxidation of AA.
ISSN:0039-9140
1873-3573
DOI:10.1016/S0039-9140(01)00642-7