Electrochemical selectivity enhancement by using monosuccinyl beta-cyclodextrin as a dopant for multi-wall carbon nanotube-modified glassy carbon electrode in simultaneous determination of quercetin and rutin

Biotechnol Lett. 2009 Nov;31(11):1739-44. doi: 10.1007/s10529-009-0066-6. Epub 2009 Jun 30.

Abstract

Monosuccinyl beta-cyclodextrin (succinyl-beta-CD) was synthesized and the selectivity to quercetin and rutin of the succinyl-beta-CD-modified, multi-wall carbon nanotube (MWNT)-coated, glassy carbon electrode [(succinyl-beta-CD + MWNT)/GCE] was investigated. (1)H NMR and MALDI-MS data confirmed molecular structure of the synthesized succinyl-beta-CD. As a dopant in carboxylated MWNT-modified electrode, succinyl-beta-CD clearly separated the peak potential (E(p)) of quercetin from that of rutin. The measured peak potential separation (DeltaE(p)) was 110 mV. More favorable complexation between succinyl-beta-CD and quercetin may enhance relative selectivity to quercetin of the (succinyl-beta-CD + MWNT)/GCE in quercetin-rutin mixture as compared to the beta-CD-modified GCE.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Carbon / chemistry*
  • Electrochemical Techniques / methods*
  • Electrodes
  • Glass / chemistry*
  • Nanotubes, Carbon / chemistry*
  • Quercetin / analysis*
  • Quercetin / chemistry
  • Rutin / analysis*
  • Rutin / chemistry
  • Spectrum Analysis
  • beta-Cyclodextrins / chemistry*

Substances

  • Nanotubes, Carbon
  • beta-Cyclodextrins
  • monosuccinyl-beta-cyclodextrin
  • Rutin
  • Carbon
  • Quercetin