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Electrochemical Behavior of Nicotine at Unmodified Carbon Paste Electrode and Its Determination in a Set of Refilling Liquids for Electronic Cigarettes
Authors: Stočes Matěj | Švancara Ivan
Year: 2014
Type of publication: článek v odborném periodiku
Name of source: Electroanalysis
Publisher name: Wiley-VCH
Place: Weinheim
Page from-to: 2655-2663
Titles:
Language Name Abstract Keywords
cze Elektrochemické chování nikotinu na nemodifikované uhlíkové pastové elektrodě a jeho stanovení v sadě náplní pro elektronické cigarety Příspěvek uvádí a popisuje vůbec poprvé voltametrickou metodu ke stanovení nikotinu na nemodifikované uhlíkové pastové elektrodě; jež spočívá na ireverzibilní oxidaci látky při poměrně vysokém pozitivním potenciálu; EP = +0;95 V vs. ref. Za příhodných podmínek je jednoduchý postup dobře použitelný ke stanovení nikotinu v komerčních sadách náplní pro elektronické cigarety. Uhlíková pastová elektroda; voltametrická oxidace; nikotin; stanovení; reálné vzorky
eng Electrochemical Behavior of Nicotine at Unmodified Carbon Paste Electrode and Its Determination in a Set of Refilling Liquids for Electronic Cigarettes In this manuscript, a carbon paste electrode (CPE) from traditional components has been used for studying of electrochemical oxidation of nicotine and its feasibility to be performed at unmodified and otherwise untreated carbon paste in an effort to propose a simple voltammetric method for the determination of nicotine in samples of refilling liquids for electronic cigarettes. As found out, irreversible oxidation of nicotine at CPE had occurred at +0.95 V vs. Ag/AgCl as a diffusion-controlled process, when suitable pH for this redox transformation was either a neutral supporting medium (phosphate buffer, pH 7.5) or mild alkaline solution (of Britton-Robinson buffer, pH 11). After having chosen the SWV mode and optimizing the key instrumental and electroanalytical parameters, the oxidation response of the substance of interest has been fairly proportional to concentration in the range of 50–500 μmol•L-1 in phosphate buffer or even 50–1000 μmol•L-1 in Britton-Robinson buffer. And if the reproducibility could substantially be improved by incorporating an effective conditioning step, the method could be applied for the determination of nicotine in real samples of refilling liquids for electronic cigarette with satisfactory results corresponding well to the values declared by manufacturer. Carbon paste electrode; voltammetric oxidation; nicotine; determination; real samples

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