Isolation of flavanol-anthocyanin adducts by countercurrent chromatography

J Chromatogr Sci. 2005 Oct;43(9):488-93. doi: 10.1093/chromsci/43.9.488.

Abstract

Pigments of the flavanol-anthocyanin (F-A+) type detected earlier in wine are synthesized using a protocol adapted from the synthesis of procyanidin dimers. The F-A+ adduct thus obtained is purified by countercurrent liquid-liquid partition, currently referred to as countercurrent chromatography (CCC). The solvent system consists of tert-butyl methyl ether-n-butanol-acetonitrile-water (2:2:1:5, acidified with 0.1% trifluoroacetyl) with the light organic phase acting as a stationary phase and the aqueous phase as the mobile phase. Four fractions are recovered and analyzed by high-performance liquid chromatography coupled to a diode-array detector and electrospray ionization mass spectrometer. The multilayer CCC method allowed the separation of pigments in three different groups. The first group consists of hydrosoluble pigments present in fraction 1; the second group consists of the F-A+ adducts [catechin-malvidin 3 glucoside (Mv3glc), along with some (catechin)2-Mv3glc]; and the third group is their anthocyanin precursor, Mv3glc.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Anthocyanins / chemistry
  • Anthocyanins / isolation & purification*
  • Chromatography, High Pressure Liquid
  • Countercurrent Distribution / methods*
  • Flavonols / chemistry
  • Flavonols / isolation & purification*
  • Spectrometry, Mass, Electrospray Ionization
  • Wine / analysis

Substances

  • Anthocyanins
  • Flavonols