title: Direct continuous supercritical fluid extraction as a novel method of wine analysis. Comparison with conventional indirect extraction and implications for wine variety identification.
abstract: Direct supercritical fluid extraction (SFE) of wines with carbon dioxide was compared to SFE of the sorbent used for solid-phase extraction of the same wine samples (SPE-SFE). Compared to SPE-SFE, the direct SFE results in amore specific and representative gas chromatographic fingerprint of the wine sample. The multivariate statistical processing of the direct SFE-GC data provides a clear-cut and sharp discrimination among the individual wine varieties while the discrimination based on the SPE-SFE-GC data is relatively poor. This finding reflects the adverse effects of additional analyte-sorbent interactions and sorption/desorption steps involved in SPE-SFE.
authors.affiliation: Institute of Analytical Chemistry, Academy of Sciences of the Czech Republic, Veverí 97, 61142 Brno, Czech Republic.
authors.forename: Pavel
authors.initials: P
authors.lastname: Karásek
authors.forename: Josef
authors.initials: J
authors.lastname: Planeta
authors.forename: Elena
authors.initials: E
authors.lastname: Varad'ová Ostrá
authors.forename: Milena
authors.initials: M
authors.lastname: Mikesová
authors.forename: Jan
authors.initials: J
authors.lastname: Goliás
authors.forename: Michal
authors.initials: M
authors.lastname: Roth
authors.forename: Jirí
authors.initials: J
authors.lastname: Vejrosta
mesh_terms: D025924:Chromatography, Supercritical Fluid / Q000379:methods*; D008401:Gas Chromatography-Mass Spectrometry; D015999:Multivariate Analysis