Determination of pentahydroxyflavones using coated chitosan multi-wall carbon nanotubes and an ionic liquid glassy carbon electrode by adsorption stripping voltammetry (AdSV)

Adrián Mariño, Yaritza Leiva, Karen Bolaños, Olimpo García-Beltrán, Edgar Nagles

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

© 2015 Elsevier B.V. All rights reserved. In this work, the determination of pentahydroxyflavones on a glassy carbon electrode modified with chitosan and multi-walled carbon nanotubes (Ch-MWCNT) was studied. The presence of ionic liquids (LIs) on the surface of the modified electrode (Ch-MWCNT-LI-GCE) increased the oxidation current by nearly 20%. The pH and electrochemical parameters (adsorptive potential and time accumulation) were optimized based on the oxidation of morin to obtain the following values: pH, 3.2; Eads, - 0.10 V; and tads, 70 s. The detection limit was 0.54 × 10- 7 mol L- 1 and the RSD was 1.7%. The new method was used to quantify pentahydroxyflavones in plant tissue samples.
Original languageAmerican English
Pages (from-to)153-157
Number of pages5
JournalJournal of Electroanalytical Chemistry
DOIs
StatePublished - 15 Dec 2015
Externally publishedYes

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