- Title
- Electrochemical behavior and detection of dopamine and ascorbic acid at an iron (II) tetrasulfophthalocyanine modified carbon paste microelectrode
- Creator
- Oni, Joshua, Westbroek, Philippe, Nyokong, Tebello
- Subject
- To be catalogued
- Date
- 2003
- Type
- text
- Type
- article
- Identifier
- http://hdl.handle.net/10962/290279
- Identifier
- vital:56735
- Identifier
- xlink:href="https://doi.org/10.1002/elan.200390104"
- Description
- In this article the electrocatalytic behavior of an iron(II)tetrasulfophthalocyanine modified carbon paste microelectrode for the oxidation of dopamine (DA) and ascorbic acid (AA) is described. Although the oxidation potential of ascorbic acid is shifted by over 100 mV to more positive potentials, no peak separation could be obtained. This can be explained by the immediate homogeneous reduction of the oxidation product of dopamine by ascorbic acid in solution. However, this reaction induces a shift of the half-wave potential as a function of ratio of concentration of dopamine to ascorbic acid (cDA/cAA). Therefore it was possible to determine the cAA and cDA from this potential shift and the experimental peak current. Detection limits of 4.5±0.2×10−7 and 7.5±0.5×10−7 mol L−1 were obtained respectively for dopamine and ascorbic acid for cDA/cAA>0.01.
- Format
- computer, online resource, application/pdf, 1 online resource (8 pages), pdf
- Publisher
- Elsevier
- Language
- English
- Relation
- Electroanalysis: An International Journal Devoted to Fundamental and Practical Aspects of Electroanalysis, Oni, J., Westbroek, P. and Nyokong, T., 2003. Electrochemical behavior and detection of dopamine and ascorbic acid at an iron (II) tetrasulfophthalocyanine modified carbon paste microelectrode. Electroanalysis: An International Journal Devoted to Fundamental and Practical Aspects of Electroanalysis, 15(10), pp.847-854, Electroanalysis: An International Journal Devoted to Fundamental and Practical Aspects of Electroanalysis volume 15 number 10 p. 847 2003 1521-4109
- Rights
- Publisher
- Rights
- Use of this resource is governed by the terms and conditions of the Wiley Library Online Terms of Use Statement (https://onlinelibrary.wiley.com/terms-and-conditions)
- Rights
- Closed Access
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Collections
Nyokong, Tebello (Distinguished Professor)
RU Department of Chemistry
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