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Updated: Jun 28, 2026

Fabrication of Amperometric Electrodes
Published on: May 4, 2009
Voltammetric and amperometric determination of ascorbic acid at a chemically modified carbon fibre microelectrode
1Laboratory of Analytical Chemistry, Abo Akademi University, SF-20500 Turku-Abo, Finland.
Abstract:
A carbon fibre microelectrode was modified by electrodeposition of a thin copper-heptacyanonitrosylferrate (CuHNF) film on its surface. The film showed the ability to catalyse electrochemical oxidation of ascorbic acid. The catalytic reaction was limited either by diffusion, or by the electrochemical reaction of the catalyst. A linear, cyclic voltammetric response for ascorbic acid was obtained between 5.0 x 10(-5) and 6.0 x 10(-3)M. By amperometric measurements the linear range could be extended to 8.0 x 10(-6)-2.0 x 10(-3)M. The modified electrode showed good stability and reproducibility.
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