title: Fingerprinting of the volatile fraction from selected thyme species by means of headspace gas chromatography with mass spectrometric detection.
abstract: The Thymus genus has a firm position in Mediterranean folk medicine and culinary tradition, and yet certain confusion is observed in its botanical taxonomy. Therefore, chemical analysis of secondary metabolites and selection of reliable chemotaxonomic markers can prove helpful. In this study, the volatile fraction derived from 20 different thyme specimens was analyzed by means of headspace GC with MS detection. From the obtained chromatographic fingerprints, the diversity of the volatile fraction originating from the different thyme species clearly emerged. Identification of volatile components was based on a software library of mass spectra. There was only one common component derived from all 20 investigated thyme species, i.e., ß-linalool. For three different Thymus species, a comparison was made of the performance of the headspace extraction and hydrodistillation. Characteristic differences in composition of the volatile fraction obtained with use of these two techniques were discussed. Finally, the obtained chromatographic fingerprints of the volatile fraction were analyzed by means of a chemometric approach (principal component analysis), in order to trace similarities in their chemical composition.
authors.affiliation: University of Silesia, Institute of Chemistry, 9 Szkolna St, Katowice, Poland.
authors.forename: Dorota
authors.initials: D
authors.lastname: Staszek
authors.forename: Marta
authors.initials: M
authors.lastname: Orłowska
authors.forename: Józef
authors.initials: J
authors.lastname: Rzepa
authors.forename: Michał S
authors.initials: MS
authors.lastname: Wróbel
authors.forename: Teresa
authors.initials: T
authors.lastname: Kowalska
authors.forename: Grażyna
authors.initials: G
authors.lastname: Szymczak
authors.forename: Monika
authors.initials: M
authors.lastname: Waksmundzka-Hajnos
mesh_terms: D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D046930:Thymus Plant / Q000737:chemistry*; D055549:Volatile Organic Compounds / Q000032:analysis*
chemical_list: D055549:Volatile Organic Compounds