The Selective Electrochemical Detection of Dopamine Using a Sulfated β-Cyclodextrin Carbon Paste Electrode

The Selective Electrochemical Detection of Dopamine Using a Sulfated β-Cyclodextrin Carbon Paste... 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). http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Electrocatalysis Springer Journals

The Selective Electrochemical Detection of Dopamine Using a Sulfated β-Cyclodextrin Carbon Paste Electrode

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Publisher
Springer US
Copyright
Copyright © 2017 by Springer Science+Business Media, LLC
Subject
Chemistry; Electrochemistry; Physical Chemistry; Catalysis; Energy Technology
ISSN
1868-2529
eISSN
1868-5994
D.O.I.
10.1007/s12678-017-0402-x
Publisher site
See Article on Publisher Site

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).

Journal

ElectrocatalysisSpringer Journals

Published: Jul 15, 2017

References

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