Electrochemical detection of carbohydrates at carbon-nanotube modified glassy-carbon electrodes

被引：97

作者：

Deo, RP ^{[1
]}

Wang, J ^{[1
]}

机构：

[1] New Mexico State Univ, Dept Chem & Biochem, Las Cruces, NM 88003 USA

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2004年 / 6卷 / 03期

基金：

美国国家科学基金会;

关键词：

sugars; single-wall carbon nanotubes; carbohydrates; voltammetry; electrocatalysis;

D O I：

10.1016/j.elecom.2004.01.003

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

This communication reports on the catalytic oxidation of carbohydrates and the sensitive and stable fixed-potential (+0.45 V) amperometric carbohydrate response at glassy-carbon electrodes modified with single-wall carbon-nanotube (CNT) coatings. Variables affecting the electrocatalytic oxidation are assessed and optimized. The oxidation process starts around +0.25 V using a 0.1 M NaOH electrolyte solution. The amperometric response is extremely stable, with no loss in sensitivity over a continuous 2 h operation. The flow-injection response is characterized with a detection limit of 10 muM galactose and a relative standard deviation of 3.45% (n=20). Such attractive performance characteristics indicate great promise for monitoring sugars in chromatographic effluents. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：284 / 287

页数：4

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