title: Sorption of 4-ethylphenol and 4-ethylguaiacol by suberin from cork.
abstract: Cork shows an active role in the sorption of volatile phenols from wine. The sorption properties of 4-ethylphenol and 4-ethylguaiacol phenols in hydro-alcoholic medium placed in contact with suberin extracted from cork were especially investigated. To that purpose, suberin was immersed in model wine solutions containing several concentrations of each phenol and the amount of the compound remaining in the liquid phase was determined by SPME-GC-MS. Sorption isotherms of 4-ethylguaiacol and 4-ethylphenol by suberin followed the Henry's model. The solid/liquid partition coefficients (KSL) between the suberin and the model wine were also determined for several other volatile phenols. Suberin displayed rather high sorption capacity, which was positively correlated to the hydrophobicity of the volatile. Finally, the capacity of suberin to decrease the concentration of 4-ethylphenol and 4-ethylguaiacol was also tested in real wines affected by a Brettanomyces character. It also lead to a significant reduction of their concentration in wine.
authors: CARINSA GROUP & Centre Especial de Recerca, Planta Tecnologia dels Aliments (CERPTA), UAB Veterinary Building, Campus UAB, 08193 Cerdanyola del Vallès, Catalonia, Spain.
authors: Joan-Josep
authors: JJ
authors: Gallardo-Chacón
authors: UMR PAM, Équipe PAPC, Agrosup Dijon/Université de Bourgogne, 1 esplanade Erasme, F-21078 Dijon, France. Electronic address: thomas.karbowiak@u-bourgogne.fr.
authors: Thomas
authors: T
authors: Karbowiak
mesh_terms: D000327:Adsorption; D008401:Gas Chromatography-Mass Spectrometry; D006139:Guaiacol / Q000031:analogs & derivatives* / Q000737:chemistry; D057927:Hydrophobic and Hydrophilic Interactions; D008055:Lipids / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry*; D029963:Quercus / Q000737:chemistry*; D014920:Wine / Q000032:analysis*
chemical_list: D008055:Lipids; D010636:Phenols; D006139:Guaiacol; C065875:suberin; C042291:4-ethylphenol; C084991:4-ethylguaiacol
keywords: Cork; Off-flavour; Sorption; Suberin; Wine