Preparative isolation of polyphenolic compounds from Vitis vinifera by centrifugal partition chromatography |
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Authors: | Delaunay Jean-Claude Castagnino Chantal Chèze Catherine Vercauteren Joseph |
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Affiliation: | Laboratoire de Pharmacognosie, EA no. 491, Faculté des Sciences Pharmaceutiques, Université Victor Segalen Bordeaux 2, 146 Rue Léo-Saignat, 33076 Bordeaux, France. |
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Abstract: | This study deals with a centrifugal partition chromatography developed for the separation of phenolic compounds from Vitis vinifera. EtOAc grape seed extracts were separated using the solvent system hexane-ethyl acetate-ethanol-water (1:8:2:7; v/v) in two fractions: one containing about 75% of flavanol monomers (catechin and epicatechin) corresponding to 18% of crude extract and another fraction B-type dimers (22% of crude extract). From the stalk extracts, we could separate stilbenoid compounds (resveratrol and its oligomers; 12% of crude extract) which were eluted in less than 30 min from flavanols (which required a few hours of additional elution). Using the same solvent system but in different ratios (4:5:3:3; v/v), we isolated the trans-resveratrol (7@1000; 90% purity). |
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