Multidimensional gas chromatography/mass spectrometry: a powerful tool for the direct chiral evaluation of aroma compounds in plant tissues. II. Linalool in essential oils and fruits.
Bernreuther A., Schreier P.
Author Affiliation: Lehrstuhl für Lebensmittelchemie, Universität Würzburg, Am Hubland, 8700 Würzburg, Germany.
Phytochemical Analysis 2 : 167-170
Abstract : On-line coupled multidimensional gas chromatography (DB-5/Lipodex C)/mass spectrometry was used for the direct chiral analysis of linalool in 15 essential oils and 16 fruit species. In a number of commercial essential oils, racemic linalool was found, whereas in the corresponding oils prepared in the laboratory, enantioselective distribution of linalool was determined. Among the fruits studied, (R)-(-)-linalool predominated in guava, greengage, lulo (Solanum vestissimum), peach and plum. In arctic bramble [Rubus arcticus], mango, yellow passion fruit [Passiflora sp.], raspberry and strawberry, the (S)-(+)-enantiomer prevailed. The occurrence of approximately racemic linalool was established in apricot (enantiomeric excess (ee) 6.0% (R)), mirabelle plum [Prunus insititia] (ee 9.4% (R)), red passion fruit (ee 9.0% (R)) and pineapple [ee 6.6% (R)].