title: Influence of the matrix composition on the volatility and sensory perception of 4-ethylphenol and 4-ethylguaiacol in model wine solutions.
abstract: This study was aimed at investigating the influence of ethanol, wine polyphenols and yeast extract on the volatility of 4-ethylphenols in red wines. The use of solid-phase microextraction with short extraction times for the study of the headspace composition, revealed a strong influence of ethanol and polyphenols on reducing the volatility of 4-ethylphenols in a model wine. At the same time, the influence of ethanol and polyphenols on the perception of the "Brett character" (stable, manure, horse sweat and phenolic notes) due to 4-ethylphenols was evaluated by sensory analysis. Polyphenols and ethanol were found to have a significant influence on the olfactory perception of the tainted wines. On the contrary, a direct influence of yeast extract on the volatility of 4-ethylphenols was not observed, although some results suggested that the effectiveness of polyphenols in reducing the volatility of 4-ethylphenols could be limited by the presence of yeast proteins.
authors.affiliation: Consiglio per la ricerca e sperimentazione in agricoltura - Centro di Ricerca per l'Enologia, via P. Micca 35, 14100 Asti, Italy.
authors.forename: Maurizio
authors.initials: M
authors.lastname: Petrozziello
authors.forename: Andriani
authors.initials: A
authors.lastname: Asproudi
authors.forename: Massimo
authors.initials: M
authors.lastname: Guaita
authors.forename: Daniela
authors.initials: D
authors.lastname: Borsa
authors.forename: Silvia
authors.initials: S
authors.lastname: Motta
authors.forename: Loretta
authors.initials: L
authors.lastname: Panero
authors.forename: Antonella
authors.initials: A
authors.lastname: Bosso
mesh_terms: D006139:Guaiacol / Q000031:analogs & derivatives* / Q000737:chemistry; D006801:Humans; D010636:Phenols / Q000737:chemistry*; D055697:Taste Perception; D014835:Volatilization; D014920:Wine / Q000032:analysis*
chemical_list: D010636:Phenols; D006139:Guaiacol; C042291:4-ethylphenol; C084991:4-ethylguaiacol
keywords: Ethanol; Ethylphenols; HS-SPME; Polyphenols; Wine