Voltammetric Determination of Dopamine in a Mixture of Dopamine and Ascorbic Acid at a Deactivated Polythiophene Film Modified Electrode

Autor:	David Yap, Yimin Zhang, Zhiqiang Gao
Rok vydání:	1998
Předmět:	Detection limit chemistry.chemical_compound chemistry Electrode Analytical chemistry Polythiophene Cyclic voltammetry Ascorbic acid Voltammetry Analytical Chemistry Nuclear chemistry Electrode potential Chemically modified electrode
Zdroj:	Analytical Sciences. 14:1059-1063
ISSN:	1348-2246 0910-6340
DOI:	10.2116/analsci.14.1059
Popis:	The voltammetric responses of dopamine (DA) and ascorbic acid (AA) at a deactivated polythiophene (PT) film modified electrode were investigated. It was found that DA displays nearly identical voltammetric response at both a bare and the modified electrode, while the voltammetric signal of AA is greatly suppressed at the modified electrode due to the repul-sion between it and the deactivated film. Various experimental parameters affecting the voltammetric responses of DA and AA were studied. The modified electrode was demonstrated to be very useful in selectively determining DA in a mixture of DA and AA. At a 0.5 μm deactivated PT film modified electrode the calibration curve of DA was linear over the range of 0.8 μM - 1.0 mM in the presence of 1.0 mM AA. The detection limit was 0.4 μM.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a9f9298a8da89554ff26beaa3516a23c https://doi.org/10.2116/analsci.14.1059 Zobrazit plný text záznamu Full text from SpringerLink