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Analytical method to evaluate taurine in energy drinks after o-phthalaldehyde-ethanethiol derivatization using square wave voltammetry
Authors: Nawar Amir Shaaban Farag Moham | Klikarová Jitka | Sýs Milan | Vytřas Karel
Year: 2019
Type of publication: článek ve sborníku
Name of source: XXXIX. moderní elektrochemické metody : sborník přednášek
Publisher name: BEST Servis
Place: Ústí nad Labem
Page from-to: 57-60
Titles:
Language Name Abstract Keywords
cze Analytická metoda k určení obsahu taurinu v energetických nápojích pomocí square wave voltametrie po derivatizaci o-ftalaldehydem a ethanthiolem Byla vyvinuta zcela nová voltametrická metoda pro kvantitativní stanovení taurinu v energetických nápojích. Tato elektroanalytická metoda je založena na elektrochemické oxidaci derivátu taurinu s o-ftalaldehydem a ethanthiolem. Analýza potravin; Derivatizace; Energetické nápoje; Elektroda ze skelného uhlíku; Square wave voltametrie.
eng Analytical method to evaluate taurine in energy drinks after o-phthalaldehyde-ethanethiol derivatization using square wave voltammetry A completely new voltammetric method has been developed for quantitative determination of food additive Taurine (Tau) in energy drinks. This electroanalytical method is based on voltammetric oxidation of o-phthalaldehyde-ethanthiol derivative of Tau at glassy carbon electrode in 95% methanol containing 0.1 mol L-1 lithium perchlorate. Working conditions necessary for quantitative Tau derivatization reaction and electrochemical detection using square wave voltammetry were optimized. Linear range from 1.0×10 5 to 1.0×10 4 mol L-1 characterized by coefficient of determination 0.9998, limits of quantification 6.81×10 6 mol L-1 and detection 2.07×10 6 mol L-1 were obtained at pulse amplitude 50 mV and frequency 80 Hz. Analytical method of calibration curve was used for monitoring of Tau in several commercially available energy drinks. The procedure was validated using standard reference high performance liquid chromatography (HPLC) method. Food analysis; Derivatization; Energy drinks; Glassy carbon electrode; Taurine; Square wave voltammetry

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