RESOLUTION OF ASCORBIC-ACID OR CATECHOLAMINE AND INDOLE ALKALOID MIXTURES BY PULSE VOLTAMMETRY AT HIGHLY POLISHED GLASSY-CARBON

被引：13

作者：

KAMAU, GN ^{[1
]}

RUSLING, JF ^{[1
]}

机构：

[1] UNIV CONNECTICUT,DEPT CHEM,STORRS,CT 06269

来源：

ELECTROANALYSIS | 1994年 / 6卷 / 5-6期

关键词：

PULSE VOLTAMMETRY; GLASSY CARBON; BIOLOGICAL COMPOUNDS;

D O I：

10.1002/elan.1140060514

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Metallographic polishing of glassy carbon electrodes (GCEs) yields well-defined oxidation peaks for two- and three-component mixtures of ascorbic acid, dopamine (DA), catechol, and hydroquinone. Linear calibration plots of differential pulse voltammetric current versus concentration were obtained for each component at a range of 0.4 to 10 muM. Deterioration of voltammograms was observed when highly polished GCE was aged in solution, resulting in positive shifts and broadening of the peaks. Lower limits of detection (LLD) in water at pH 7 were about 0.01 muM for DA and 1 muM for AA. Highly polished GCEs were further applied to mixtures of naturally occurring indole alkaloids.

引用

页码：445 / 450

页数：6

共 22 条

[1]

Adams R. N., 1976, ANAL CHEM, V48, p1128A

[2]

Aldaz A., 1983, J ELECTROANAL CHEM, V156, P279

[3]

BOBBITT JM, 1981, HETEROCYCLES, V25, P495

[4] ELECTROCATALYTIC OXIDATION OF NADH AND ASCORBIC-ACID ON ELECTROCHEMICALLY PRETREATED GLASSY-CARBON ELECTRODES [J].