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

作者：Marino Adrian; Leiva Yaritza; Bolanos Karen; Garcia Beltran Olimpo; Nagles Edgar^*

来源：Journal of Electroanalytical Chemistry, 2015, 759: 153-157.

DOI：10.1016/j.jelechem.2015.11.008

• Pentahydroxyflavone
• Adsorption voltammetry
• Multi-wall carbon nanotubes
• Ionic liquids

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 (Us) 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; E-ads, -0.10 V; and t(ads), 70 s. The detection limit was 0.54 x 10(-7) mol L-1 and the RSD was 1.7%. The new method was used to quantify pentahydroxyflavones in plant tissue samples.

• 出版日期2015-12-15