A Novel γ- Aminobutyric Acid Monolayer Modified Glassy Carbon Electrode for Simultaneous Determination of Dopamine, Uric Acid and Ascorbic Acid

Abstract

Abstract: A novel monolayer γ aminobutyric acid covalently modified glassy carbon electrode has been fabricated via electrochemical oxidation procedure and was characterized with X ray photoelectron spectra(XPS) and cyclic voltammetry. The modified electrode was not only used to electrocatalyze the oxidation of dopamine(DA), uric acid(UA) and ascorbic acid(AA), but also gave rise to three well defined square wave voltammetric peaks, which can be used for simultaneous determination of these species in a mixture. The modified electrode shows good sensitivity, selectivity, stability and anti fouling effects.

Key words: Aminobutyric acid, Modified electrode, Square wave voltammetry, Dopamine, Uric acid, Ascorbic acid

CLC Number:

O657

TrendMD:

ZHANG Lei, LIN Xiang Qin. A Novel γ- Aminobutyric Acid Monolayer Modified Glassy Carbon Electrode for Simultaneous Determination of Dopamine, Uric Acid and Ascorbic Acid[J]. Chem. J. Chinese Universities, 2003, 24(4): 591.

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A Novel γ- Aminobutyric Acid Monolayer Modified Glassy Carbon Electrode for Simultaneous Determination of Dopamine, Uric Acid and Ascorbic Acid

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