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

被引：25

作者：

Gnahore, Gama Theophile ^{[1
]}

Velasco-Torrijos, Trinidad ^{[1
]}

Colleran, John ^{[2
]}

机构：

[1] Maynooth Univ, Dept Chem, Maynooth, Kildare, Ireland

[2] Dublin Inst Technol, Sch Chem & Pharmaceut Sci, Kevin St, Dublin 8, Ireland

来源：

ELECTROCATALYSIS | 2017年 / 8卷 / 05期

关键词：

Dopamine; Ascorbic acid; Serotonin; Simultaneous detection; Sulfated beta-cyclodextrin; Microelectrode; MODIFIED GOLD ELECTRODES; ASCORBIC-ACID; URIC-ACID; IN-VIVO; FIBER MICROELECTRODE; CYCLIC VOLTAMMETRY; AQUEOUS-SOLUTION; CATECHOLAMINES; FILM; SEROTONIN;

D O I：

10.1007/s12678-017-0402-x

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The present work describes a novel approach for the determination of dopamine (DA) using carbon paste electrodes modified with sulfated beta-cyclodextrin (S-beta-CDCPE). The electrodes show high affinity towards DA electrochemical oxidation. DA returned a concentration detection range 5 x 10(-7) M to 5 x 10(-4) M and a detection limit of 1.33 x 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-beta-CDCPE, while the unmodified CPE returned an overlapping response. In particular, S-beta-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).

引用

页码：459 / 471

页数：13

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