Univerzita Pardubice Fakulta chemicko- technologická

Univerzita Pardubice

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Publikace detail

Possibilities of simultaneous voltammetric detection of tocopherols in non-aqueous media

Autoři: Jashari Granit | Sýs Milan | Metelka Radovan | Švancara Ivan

Rok: 2019

Druh publikace: ostatní - přednáška nebo poster

Strana od-do: nestránkováno

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
eng	Possibilities of simultaneous voltammetric detection of tocopherols in non-aqueous media	An electrochemical study was performed to develop a voltammetric method suitable for simultaneous detection of tocopherols based on their anodic oxidation at various electrode materials in non-aqueous supporting electrolytes. Several working conditions, such as selection of working electrode, supporting electrolyte, effect of surfactant, water content and parameters of square-wave voltammetry, were optimized. An overlapping of corresponding peaks of alpha-, gamma- and delta- form was observed. The separation of oxidation signals was improved at optimum working conditions, but the signals were not completely resolved. It was found that this phenomenon did not cause significant changes in peak currents for constant concentrations of tocopherols in their different concentration ratios, which could be possibly utilized in analytical application. Nevertheless, use of some data processing techniques could help to improve the resolution of signals and to enable more precise analytical quantification of different tocopherols.