The chemical profiles of commercial grape seed extracts (GSE) and its isolated fractions characterized by phloroglucinolysis and gel permeation chromatography (GPC).

a<p>Mass conversion based on % recovery of procyanidin by phloroglucinolysis based on the gravimetric mass. ^bMean degree of polymerization in epicatechin units. ^cMolecular mass as determined by phloroglucinolysis. ^dMolecular mass as determined by GPC at 50% procyanidin elution. ^ePercent composition of procyanidin fractions by gravimetric recovery. ^fPercent composition of subunits (in moles) with the following subunit abbreviations: (-P), phloroglucinol adduct of extension subunit; C, (+)-catechin; EC, (−)-epicatechin; ECG, (−)-epicatechin-3-<i>O</i>-gallate. ^gCrude grape seed extract of which 55% w/w eluted in F0 and 45% w/w was recovered as procyanidin for further fractionation.