ELECTROCATALYSIS AND DETERMINATION OF HYDRAZINE COMPOUNDS IN LIQUID-CHROMATOGRAPHY AT A MIXED-VALENT COBALT OXIDE CYANOCOBALTATE FILM ELECTRODE


Autoria(s): ZHOU JX; WANG EK
Data(s)

1993

Resumo

A glassy carbon electrode coated with an electrodeposited film of mixed-valent cobalt oxide/cyanocobaltate (Co-O/CN-Co) enabled hydrazine compounds to be catalytically oxidized at the greatly reduced overpotential and in a wide operational pH range (pH 2.0-7.0). Electrocatalytic activity at the Co-O/CN-Co modified electrode was evaluated with respect to solution pH, film thickness, supporting electrolyte ions, potential scan rate, operating potential, concentration dependence and other variables. The Co-O/CN-Co film electrode was completely compatible with a conventional reversed-phase liquid chromatographic (RP-LC) system. Practical RP-LC amperometric detection (RP-LCEC) of hydrazines was performed. A dynamic linear response range over three orders of magnitude and a detection limit at the pmol level were readily obtained. The Co-O/CN-CO film electrode exhibited excellent electrocatalytic stability in the flowing streams.

Identificador

http://ir.ciac.jl.cn/handle/322003/36179

http://www.irgrid.ac.cn/handle/1471x/161669

Idioma(s)

英语

Fonte

ZHOU JX;WANG EK.ELECTROCATALYSIS AND DETERMINATION OF HYDRAZINE COMPOUNDS IN LIQUID-CHROMATOGRAPHY AT A MIXED-VALENT COBALT OXIDE CYANOCOBALTATE FILM ELECTRODE,TALANTA,1993,40(6):943-948

Palavras-Chave #GLASSY-CARBON ELECTRODE #CHEMICALLY MODIFIED ELECTRODES #FLOW-INJECTION AMPEROMETRY #PRUSSIAN BLUE #ELECTROCHEMICAL DETECTION #ASCORBIC-ACID #THIN-FILM #OXIDATION #REDUCTION #METHANOL
Tipo

期刊论文