title: Distribution of enantiomers of volatile organic compounds in selected fruit distillates.
abstract: The enantiomer ratios of chiral volatile organic compounds in fruit distillates were determined by multidimensional gas chromatography using solid-phase microextraction (SPME) as a sample treatment procedure. Linalool and its oxides, limonene, α-terpineol, and nerolidol, were present at the highest concentration levels, while significantly lower amounts of β-citronellol and lactones were found in the studied samples. However, almost all terpenoids mainly occur as a racemic or near-racemic mixture; enantiomer distribution of some chiral organic compounds in fruit distillates correlated to a botanical origin. In particular, a significant enantiomeric excess of (R)-linalool and (S)-α-terpineol was found only for pear brandy, and likewise the dominance (R)-limonene and the second eluted enantiomer of nerolidol for Sorbus domestica and strawberry, respectively. The distribution of γ-lactones stereoisomers was more nonspecific, with a general excess of the R-enantiomer.
authors.affiliation: Slovak University of Technology in Bratislava, Faculty of Chemical and Food Technology, Institute of Analytical Chemistry, Bratislava, Slovak Republic.
authors.forename: Olga
authors.initials: O
authors.lastname: Vyviurska
authors.affiliation: Slovak University of Technology in Bratislava, Faculty of Chemical and Food Technology, Institute of Analytical Chemistry, Bratislava, Slovak Republic.
authors.forename: Helena
authors.initials: H
authors.lastname: Zvrškovcová
authors.affiliation: Slovak University of Technology in Bratislava, Faculty of Chemical and Food Technology, Institute of Analytical Chemistry, Bratislava, Slovak Republic.
authors.forename: Ivan
authors.initials: I
authors.lastname: Špánik
mesh_terms: D000080462:Acyclic Monoterpenes; D002849:Chromatography, Gas; D000081005:Cyclohexane Monoterpenes; D053138:Cyclohexenes / Q000737:chemistry*; D005638:Fruit / Q000737:chemistry*; D000077222:Limonene; D039821:Monoterpenes / Q000737:chemistry*; D052617:Solid Phase Microextraction; D013237:Stereoisomerism; D013729:Terpenes / Q000737:chemistry*; D055549:Volatile Organic Compounds / Q000032:analysis / Q000737:chemistry*
chemical_list: D000080462:Acyclic Monoterpenes; D000081005:Cyclohexane Monoterpenes; D053138:Cyclohexenes; D039821:Monoterpenes; D013729:Terpenes; D055549:Volatile Organic Compounds; C016775:alpha-terpineol; D000077222:Limonene; C018584:linalool
keywords: chiral separations; fruit distillates; multidimensional gas chromatography; terpenoids; γ-lactones