Publikace: Determination of ascorbic acid using multi-wall carbon nanotubes immobilized on carbon paste electrode
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Vu, Dai Long
Sýs, Milan
Vytřas, Karel
Červenka, Libor
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Univerzita Pardubice
Abstrakt
In this study, multi-wall carbon nanotubes (MWCNTs) immobilized on carbon paste electrode (CPE) was employed for the amperometric detection of ascorbic acid (AA). The influence of pH on the electrocatalytic effect of MWCNTs/CPE towards the oxidation of AA was studied; the effect of the potential applied and the stirring speed for amperometric detection of AA was investigated. The calibration curve was obtained for AA concentrations in a range of 1-100 μM. The detection limit for the method proposed was found to be 0.1 μM in the amperometric mode.
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carbon paste electrode, multi-wall carbon nanotubes, electrocatalytic oxidation, modified electrode, voltammetry, amperometry, determination, ascorbic acid