title: Optimisation of stir bar sorptive extraction for the analysis of volatile phenols in wines.
abstract: An easy, fast and reliable analytical method is proposed for the determination of the concentration of volatile phenols (ethyl- and vinylphenols) in wines. The novel stir bar sorptive extraction (SBSE) technique is employed, following a simple and fast procedure that allows 15 samples to be extracted simultaneously using very small sample volume. Extracts are desorbed in a thermodesorption system (TDS) coupled on-line to a gas chromatograph-mass spectrometry system. The SBSE offers better recovery and linear regression coefficient (r2) for the four volatile phenols than solid-phase extraction (SPE). The mass spectrometric detection in selected ion monitoring mode contributes to the lower detection limit and good sensibility obtained with this method.
authors.affiliation: Departamento Técnico, Osborne y Cía, S.A., Fernan Caballero 3, 11500 El Puerto de Santa Maria, Cádiz, Spain.
authors.forename: Juan
authors.initials: J
authors.lastname: Díez
authors.forename: Cristina
authors.initials: C
authors.lastname: Domínguez
authors.forename: Dominico A
authors.initials: DA
authors.lastname: Guillén
authors.forename: Rafael
authors.initials: R
authors.lastname: Veas
authors.forename: Carmelo G
authors.initials: CG
authors.lastname: Barroso
mesh_terms: D002849:Chromatography, Gas / Q000379:methods; D010636:Phenols / Q000032:analysis*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014835:Volatilization; D014920:Wine / Q000032:analysis*
chemical_list: D010636:Phenols