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Please use this identifier to cite or link to this item: http://dspace.utalca.cl/handle/1950/3351

Title: A simple method to separate red wine nonpolymeric and polymeric phenols by solid-phase extraction
Authors: Pinelo, M.
Laurie, V.F.
Waterhouse, A.L.
Keywords: C18 cartridges; red wines; solid-phase extraction; tannins; purification
Issue Date: Apr-2006
Publisher: American Chemical Society
Citation: Journal of Agricultural and Food Chemistry 54 (8): 2839-2844
Abstract: imple polyphenols and tannins differ in the way that they contribute to the organoleptic profile of wine and their effects on human health. Very few straightforward techniques to separate red wine nonpolymeric phenols from the polymeric fraction are available in the literature. In general, they are complex, time-consuming, and generate large amounts of waste. In this procedure, the separation of these compounds was achieved using C18 cartridges, three solvents with different elution strenghts, and pH adjustments of the experimental matrices. Two full factorial 23 experimental designs were performed to find the optimal critical variables and their values, allowing for the maximization of tannin recovery and separation efficiency (SE). Nonpolymeric phenols such as phenolic acids, monomers, and oligomers of flavonol and flavan-3-ols and anthocyanins were removed from the column by means of an aqueous solvent followed by ethyl acetate. The polymeric fraction was then eluted with a combination of methanol/acetone/water.
Description: Laurie, V. F.Centro Tecnologico de la Vid y el Vino,Facultad de Recursos Naturales,Universidad de Talca,Talca,Chile.
URI: http://dspace.utalca.cl/handle/1950/3351
ISSN: 0021-8561
Appears in Collections:Artículos en publicaciones ISI - Universidad de Talca

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