Voltammetric separation of dopamine and ascorbic acid with graphite electrodes modified with ultrafine TiO2

被引：49

作者：

Li, QW ^{[1
]}

Wang, YM ^{[1
]}

Luo, GA ^{[1
]}

机构：

[1] Tsing Hua Univ, Dept Chem, Beijing 100084, Peoples R China

来源：

MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS | 2000年 / 11卷 / 01期

基金：

中国国家自然科学基金;

关键词：

nanosized TiO2; modified electrode; redox behavior; dopamine; ascorbic acid;

D O I：

10.1016/S0928-4931(00)00132-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, a new method was introduced to separate dopamine and ascorbic acid simultaneously. When a graphite electrode was modified with nanosized TiO2 powder, it exerted little influence on the redox behavior of dopamine, but led to the anodic potential of ascorbic acid to move negatively which enlarged the anodic separation potential between dopamine and ascorbic acid to some extent. Better separation could be achieved with bare C and TiO2 modified electrode at higher scan rate. The catalytical ability of nanosized metal oxide on the voltammetric behavior of dopamine and ascorbic acid was discussed as well. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：71 / 74

页数：4

共 13 条

[1]

DONG S, 1993, CHEM MODIFIED ELECTR, P260

[2] SMALL-PARTICLE RESEARCH - PHYSICOCHEMICAL PROPERTIES OF EXTREMELY SMALL COLLOIDAL METAL AND SEMICONDUCTOR PARTICLES [J].

HENGLEIN, A .

CHEMICAL REVIEWS, 1989, 89 (08) :1861-1873

[3] Surface and kinetic enhancement of selectivity and sensitivity in analysis with fast scan voltammetry at scan rates above 1000 V/s [J].

Hsueh, C ;

Bravo, R ;

Jaramillo, AJ ;

BrajterToth, A .

ANALYTICA CHIMICA ACTA, 1997, 349 (1-3) :67-76

[4] Voltammetric behaviour of dopamine at nickel phthalocyanine polymer modified electrodes and analytical applications [J].

Kang, TF ;

Shen, GL ;

Yu, RQ .

ANALYTICA CHIMICA ACTA, 1997, 354 (1-3) :343-349

[5] DIFFERENTIAL DOUBLE PULSE VOLTAMMETRY AT CHEMICALLY MODIFIED PLATINUM-ELECTRODES FOR INVIVO DETERMINATION OF CATECHOLAMINES [J].

LANE, RF ;

HUBBARD, AT .

ANALYTICAL CHEMISTRY, 1976, 48 (09) :1287-1293

[6]

LI GX, 1994, CHINESE J ANAL CHEM, V22, P138

[7] ION-EXCHANGE AND TRANSPORT OF NEUROTRANSMITTERS IN NAFION FILMS ON CONVENTIONAL AND MICROELECTRODE SURFACES [J].

NAGY, G ;

GERHARDT, GA ;

OKE, AF ;

RICE, ME ;

ADAMS, RN ;

MOORE, RB ;

SZENTIRMAY, MN ;

MARTIN, CR .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1985, 188 (1-2) :85-94

[8] THEORY AND APPLICATION OF CYCLIC VOLTAMMETRY FOR MEASUREMENT OF ELECTRODE REACTION KINETICS [J].

NICHOLSON, RS .

ANALYTICAL CHEMISTRY, 1965, 37 (11) :1351-+

[9]

RINNE JO, 1991, BRAIN RES, V547, P167

[10]

SHE H, 1996, ANAL LAB, V15, P1

← 1 2 →