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Analytical and Bioanalytical Chemistry

, Volume 390, Issue 7, pp 1917–1925 | Cite as

Major flavonoid components of heartsease (Viola tricolor L.) and their antioxidant activities

  • Viktoria Vukics
  • Agnes Kery
  • Guenther K. Bonn
  • Andras Guttman
Original Paper

Abstract

Sephadex LH-20 column chromatography was used to separate flavonoid components in a heartsease methanol extract. One of the main components was identified by NMR as violanthin (6-C-glucosyl-8-C-rhamnosylapigenin). As a first approximation, the other main flavonoid component was considered to be rutin (3-O-rhamnoglucosylquercetin), based on comprehensive comparison of retention times and UV spectra of reference molecules, as well as molecular mass and fragmentation patterns obtained by mass spectrometry. The minor flavonoids were separated by polyamide column and analyzed by LC-MS. The antioxidant capacity of different flavonoid fractions was determined using both Trolox equivalent antioxidant capacity (TEAC) and 2,2-diphenyl-1-picrylhydrazyl (DPPH) in vitro antioxidant assays. The highest electron-donor capacity was found for the major flavonoid component (rutin), whereas one minor component-rich flavonoid fraction exhibited the highest hydrogen-donor activity.

Keywords

Flavonoid isolation Column chromatography NMR LC-MS Antioxidants 

Abbreviations

COSY

correlation spectroscopy

HMBC

heteronuclear multibond correlation

HSQC

heteronuclear single-quantum coherence

NOESY

nuclear Overhauser effect spectroscopy

TOCSY

total correlation spectroscopy

Notes

Acknowledgement

The support of the Marie Curie Chair (006733) of the European Commission is gratefully acknowledged. The authors also thank Prof. Béla Noszál for providing access to the 600-MHz NMR spectrometer at the Semmelweis University.

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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • Viktoria Vukics
    • 1
    • 2
  • Agnes Kery
    • 2
  • Guenther K. Bonn
    • 1
  • Andras Guttman
    • 1
  1. 1.Horvath Laboratory of Bioseparation SciencesUniversity of InnsbruckInnsbruckAustria
  2. 2.Institute of PharmacognosySemmelweis UniversityBudapestHungary

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