title: Statistical analysis of wines using a robust compositional biplot.
abstract: Eight phenolic acids (vanillic, gentisic, protocatechuic, syringic, gallic, coumaric, ferulic and caffeic) were quantitatively determined in 30 commercially available wines from South Moravia by gas chromatography-mass spectrometry. Raw (untransformed) and centered log-ratio transformed data were evaluated by classical and robust version of principal component analysis (PCA). A robust compositional biplot of the centered log-ratio transformed data gives the best resolution of particular categories of wines. Vanillic, syringic and gallic acids were identified as presumed markers occurring in relatively higher concentrations in red wines. Gentisic and caffeic acid were tentatively suggested as prospective technological markers, reflecting presumably some kinds of technological aspects of wine making.
authors.affiliation: Department of Mathematical Analysis and Applications of Mathematics, Faculty of Science, Palacký University, 17. listopadu 12, CZ-77146 Olomouc, Czech Republic. hronk@seznam.cz
authors.forename: K
authors.initials: K
authors.lastname: Hron
authors.forename: M
authors.initials: M
authors.lastname: Jelínková
authors.forename: P
authors.initials: P
authors.lastname: Filzmoser
authors.forename: R
authors.initials: R
authors.lastname: Kreuziger
authors.forename: P
authors.initials: P
authors.lastname: Bednář
authors.forename: P
authors.initials: P
authors.lastname: Barták
mesh_terms: D015415:Biomarkers / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry; D062385:Hydroxybenzoates / Q000032:analysis*; D014920:Wine / Q000032:analysis*
chemical_list: D015415:Biomarkers; D062385:Hydroxybenzoates; C017616:phenolic acid