Liquid chromatography with electrocatalytic detection of oxalic acid by a palladium-based glassy carbon electrode

被引：23

作者：

Casella, IG

Zambonin, CG

Prete, F

机构：

[1] Univ Basilicata, Dipartimento Chim, I-85100 Potenza, Italy

[2] ASL N2, Lab Analisi, I-85100 Potenza, Italy

来源：

JOURNAL OF CHROMATOGRAPHY A | 1999年 / 833卷 / 01期

关键词：

detection; LC; electrochemical detection; oxalic acid;

D O I：

10.1016/S0021-9673(98)00998-4

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

Cyclic voltammetry, how injection analysis and liquid chromatography experiments were performed to characterise a palladium-modified glassy carbon electrode as an amperometric sensor for the determination of oxalic acid in perchloric acid solutions. The effects of several common interferents on the amperometric signal were also evaluated. The electrode stability, precision, limit of detection and linear range were evaluated at a constant applied potential of 1.1 V vs. Ag/AgCl. Calibration plots, obtained using liquid chromatography, were linear from 0.2 mu M to 1.2 mM (r(2) = 0.9986) and the detection limit was 0.15 mu M for a 50-mu l injection. An example of analytical application, which includes the chromatographic separation and detection of oxalic acid in human urine, is given. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：75 / 82

页数：8

共 23 条

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