CAPILLARY-ELECTROPHORESIS ANALYSIS OF TRANS-RESVERATROL AND CIS-RESVERATROL, QUERCETIN, CATECHIN AND GALLIC ACID IN WINE

A study was conducted on the use of micellar electrokinetic capillary chromatography (MEKC) in the analysis of trans- and cis-resveratrol, q uercetin catechin and gallic acid in wine. Standards and wine samples were directly injected into CE after a simple filtration, under a pres sure of 50 mbar. Separation of the compounds was done in bare fused-si lica capillary-extended light path with 50 mu m i.d. An excellent corr elation coefficient (r = 0.99998) was obtained with a linear analytica l response from 8 to 1000 ppm of resveratrol, quercetin, catechin and gallic acid in MEKC. The high separation efficiency obtained recommend CE as a good application for trans- and cis-resveratrol detection in wine. (C) 1998 Elsevier Science Ltd. All rights reserved.