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Mesoporous silica SBA-15, a new adsorbent for bioactive polyphenols from red wine
Authors:VV Cotea  CE Luchian  N Bilba  M Niculaua
Institution:1. Laboratory of Materials Chemistry, Faculty of Chemistry, “Al. I. Cuza” University of Iasi, 11 Carol I Bvd, 700506 Iasi, Romania;2. Laboratory of Oenological Research, Faculty of Horticulture, University of Agricultural Sciences and Veterinary Medicine, 3 Mihail Sadoveanu Alley, 700490 Iasi, Romania;3. Oenology Research Center, Romanian Academy, 8, Carol I Bvd, 700505 Iasi, Romania
Abstract:The aim of this paper is to evaluate the ability of the mesoporous silica SBA-15 to adsorb polyphenols from red wine. The mesoporous molecular sieve silica SBA-15 was hydrothermally synthesized in acidic media and characterized by SAXRD, BET, EDX and SEM. The adsorption behavior of mesoporous silica SBA-15 was investigated at 5 °C for 24 h using an adsorbent dose of 8 g SBA-15 L−1 red wine. The total polyphenols content expressed as mg of gallic acid equivalents (GAE L−1) was estimated from the standard curve of gallic acid (absorbance at 280 nm). HPLC chromatograms of methanolic extract from mesoporous SBA-15 at 256, 280, 324, and 365 nm exhibits the strong retention of quercetin and cis-resveratrol and a reasonable retention of trans-resveratrol, catechin, epicatechin, rutin, and phenolic acids (meta- and para-hydroxybenzoic, vanillic, caffeic, syringic, salicylic and para-coumaric acids).
Keywords:Phenolic compounds  Mesoporous silica SBA-15  Adsorption  Red wine  HPLC-DAD
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