AMPEROMETRIC DETERMINATION OF DOPAMINE ON AN ENZYMATICALLY MODIFIED CARBON-PASTE ELECTRODE

被引：89
|
作者：
FORZANI, ES
RIVAS, GA
SOLIS, VM
机构：
[1] INFIQC, Departamento de Físico Química, Facultad de Ciencias Químicas, 5016 Córdoba, Sucursal 16
来源：
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1995年 / 382卷 / 1-2期
关键词：
AMPEROMETRY; ENZYME ELECTRODE; DOPAMINE; CARBON PASTE ELECTRODE;
D O I：
10.1016/0022-0728(94)03640-O
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The amperometric determination of dopamine under controlled convective conditions on an enzymatically modified carbon paste electrode was studied using potato tissue as a source of polyphenol oxidase. Enzymatic kinetic constants and substrate diffusional-resistance parameters were determined and an analysis of the most common interferents was made. It is concluded that the electrode is suitable for the quantification of dopamine with a detection limit as low as 2.5 x 10(-6) M when the hydrodynamic conditions are carefully controlled. The electrode is active towards dopac, ascorbic acid and pyrocatechol but not L-tyrosine, L-dopa, homovanillic acid, adrenaline, normetanephrine and vanilmandelic acid.
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收藏
页码：33 / 40
页数：8
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