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Možnosti stanovení kyseliny askorbové na polyanilinem modifikované uhlíkové pastové elektrodě. Úvodní studie
Authors: Stočes Matěj | Švancara Ivan
Year: 2014
Type of publication: článek ve sborníku
Name of source: Sborník přednášek mezinárodní odborné konference XXXIV. Moderní elektrochemické metody
Publisher name: BEST Servis
Place: Ústí nad Labem
Page from-to: 171-175
Titles:
Language Name Abstract Keywords
cze Možnosti stanovení kyseliny askorbové na polyanilinem modifikované uhlíkové pastové elektrodě. Úvodní studie Polyaniline (PANI) byl syntetizován by elektropolymerací pomocí tzv. cykolvání potenciálu v režimu CV na uhlíkové pastové elektrodě z roztoku 0.2 M (monomerního) anilinu v prostředí 1 M HCl. Výsledná konfigurace “PANI-CPE” byla testována amperometricky jsako čidlo pro detekci a stanovení kyseliny askorbové (AA). Uhlíková pastová elektroda; anilin; elektropolymerace / modifikace; kyselina askorbová; amperometrická detekce.
eng Insight into the Determination of Ascorbic Acid at Polyaniline Modified Carbon Paste Electrode Polyaniline (PANI) was synthesized by electropolymerization with the aid of potential cycling technique at a carbon paste electrode (CPE) from the 0.2 M aniline (monomer) solution in the presence of 1 M HCl. The PANI-CPE configuration was tested in the amperometric mode with respect to sensitivity towards ascorbic acid (AA). Firstly, the electropolymerization process was optimized finding that 5 potential cycles (n=5) formed the optimal PANI layer for further determination of AA. The operational potential for amperometric detection was investigated in a range of –0.1V to +0.6V vs. ref., concluding that the value of choice would be in the interval of Eop= 0–0.2V. Then, a linear response of ascorbic acid could be obtained in the concentration range from 100 to 1700 μM, which can be expressed by the respective linear regression data y = 8.863x + 0.078 and r2 = 0.998 Carbon paste electrode; Aniline; Electropolymerization / modification; ascorbic acid; amperometric detection.

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