Gnahore, Gama Theophile and Velasco-Torrijos, Trinidad and Colleran, John (2017) The Selective Electrochemical Detection of Dopamine Using a Sulfated β-Cyclodextrin Carbon Paste Electrode. Electrocatalysis, 8 (5). pp. 459-471. ISSN 1868-2529

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Abstract

The present work describes a novel approach for the determination of dopamine (DA) using carbon paste electrodes modified with sulfated β-cyclodextrin (S-β-CDCPE). The electrodes show high affinity towards DA electrochemical oxidation. DA returned a concentration detection range 5 × 10−7 M to 5 × 10−4 M and a detection limit of 1.33 × 10−7 M. DA, ascorbic acid (AA), and serotonin (5-HT) in a solution mixture can be simultaneously oxidized at significantly different potentials in the presence of S-β-CDCPE, while the unmodified CPE returned an overlapping response. In particular, S-β-CD-modified carbon paste microelectrode exhibits clear peak potential separations of 0.161, 0.101, and 0.258 V (vs. Ag/AgCl) for AA/DA, DA/5-HT, and AA/5-HT, respectively, in artificial cerebrospinal fluid (aCSF).

Item Type:	Article
Keywords:	Dopamine; Ascorbic acid; Serotonin; Simultaneous detection; Sulfated β-cyclodextrin; Microelectrode;
Academic Unit:	Faculty of Science and Engineering > Chemistry
Item ID:	11544
Identification Number:	https://doi.org/10.1007/s12678-017-0402-x
Depositing User:	Dr. Trinidad Velasco-Torrijos
Date Deposited:	30 Oct 2019 16:40
Journal or Publication Title:	Electrocatalysis
Publisher:	Elsevier
Refereed:	Yes
URI:	Publisher
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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