Amperometric determination of ascorbic acid based on electrocatalytic oxidation using a ruthenium(III) diphenyldithiocarbamate-modified carbon paste electrode

被引：74

作者：

Nalini, B ^{[1
]}

Narayanan, SS ^{[1
]}

机构：

[1] Univ Madras, Sch Chem Sci, Dept Analyt Chem, Madras 600025, Tamil Nadu, India

来源：

ANALYTICA CHIMICA ACTA | 2000年 / 405卷 / 1-2期

关键词：

ruthenium(III)diphenyldithiocarbamate; modified carbon paste electrode; electrocatalytic oxidation; ascorbic acid;

D O I：

10.1016/S0003-2670(99)00689-3

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A modified carbon paste electrode was prepared with an aqueous insoluble redox mediator, ruthenium(III) diphenyldithiocarbamate. The electrode was scanned between 0.0 V to +0.8 V in KNO3 medium. The modified electrode electrocatalytically oxidises ascorbic acid. Conditions such as pH and scan rate have been optimised for the determination of ascorbic acid. A linear response was observed in the range of 2.5-125 mg l(-1), with a correlation coefficient (r), of 0.9998. Standard deviation for 10 repetitive determinations was found to be 100 +/- 0.6. The stability and reproducibility of the electrode for determinations were also discussed. Hydrodynamic voltammogram was also recorded for electrocatalytic oxidation. Amperometric determination and studies on the stability of the electrode were carried out for a period of 10 days. (C)2000 Elsevier Science B.V. All rights reserved.

引用

页码：93 / 97

页数：5

共 14 条

[1] ELECTROCATALYTIC OXIDATION AND AMPEROMETRIC DETECTION OF ALIPHATIC AND FURANIC ALDEHYDES AT A MIXED-VALENT RUTHENIUM OXIDE RUTHENIUM CYANIDE FILM ON GLASSY-CARBON ELECTRODES [J].

CATALDI, TRI ;

CAMPA, C ;

CENTONZE, D .

ANALYTICAL CHEMISTRY, 1995, 67 (20) :3740-3745

[2] MIXED-VALENT RUTHENIUM OXIDE RUTHENIUM CYANIDE INORGANIC FILM ON GLASSY-CARBON ELECTRODES AS AN AMPEROMETRIC SENSOR OF ALIPHATIC-ALCOHOLS [J].

CATALDI, TRI ;

CENTONZE, D ;

GUERRIERI, A .

ANALYTICAL CHEMISTRY, 1995, 67 (01) :101-107

[3] STABLE MODIFIED ELECTRODES FOR FLOW-INJECTION AMPEROMETRY - APPLICATION TO THE DETERMINATION OF THIOCYANATE [J].

COX, JA ;

GRAY, T ;

KULKARNI, KR .

ANALYTICAL CHEMISTRY, 1988, 60 (17) :1710-1713

[4] VOLTAMMETRIC AND AMPEROMETRIC DETERMINATION OF ASCORBIC-ACID AT A CHEMICALLY MODIFIED CARBON-FIBER MICROELECTRODE [J].

GAO, ZQ ;

IVASKA, A ;

ZHA, TX ;

WANG, GQ ;

LI, PB ;

ZHAO, ZF .

TALANTA, 1993, 40 (03) :399-403

[5] AMPEROMETRIC DETERMINATION OF N-NITROSAMINES IN AQUEOUS-SOLUTION AT AN ELECTRODE COATED WITH A RUTHENIUM-BASED INORGANIC POLYMER [J].

GORSKI, W ;

COX, JA .

ANALYTICAL CHEMISTRY, 1994, 66 (17) :2771-2774

[6] CHEMICALLY MODIFIED CARBON PASTE ELECTRODES IN VOLTAMMETRIC ANALYSIS [J].

KALCHER, K .

ELECTROANALYSIS, 1990, 2 (06) :419-433

[7] GLUCOSE-OXIDATION AT RUTHENIUM DIOXIDE-BASED ELECTRODES [J].

LYONS, MEG ;

FITZGERALD, CA ;

SMYTH, MR .

ANALYST, 1994, 119 (05) :855-861

[8]

MA QH, 1994, CHINESE J ANAL CHEM, V22, P121

[9]

Nalini B, 1998, ELECTROANAL, V10, P779

[10]

Nalini B, 1997, B ELECTROCHEM, V13, P330

← 1 2 →