Sensitive Voltammetric Determination of Natural Flavonoid Quercetin on a Disposable Graphite Lead
| Autor: | Dai Long Vu, Simona Žabčíková, Libor Červenka, Bensu Ertek, Yusuf Dilgin |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Food Technology and Biotechnology, Vol 53, Iss 4, Pp 379-384 (2015) |
| Druh dokumentu: | article |
| ISSN: | 1330-9862 1334-2606 |
| DOI: | 10.17113/ftb.53.04.15.4176 |
| Popis: | In this paper, a pencil graphite electrode was pretreated using chronoamperometry technique in phosphate buffer solution (pH=7.0) for sensitive determination of quercetin. Oxidation of quercetin was investigated using pretreated pencil graphite electrode and anodic stripping differential pulse voltammetry. Under optimal conditions, the anodic current of quercetin exhibited linear response to its concentration in the range from 0.001 to 1.5 μmol/L with the limit of detection of 0.3·10–3 μmol/L. The proposed method was successfully applied for the determination of quercetin in cranberry and blackcurrant juices with recovery rate from 93.2 to 94.7 %. Solid-phase extraction was found to be necessary prior to voltammetric determination of quercetin in fruit juice samples using pretreated pencil graphite electrode. |
| Databáze: | Directory of Open Access Journals |
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