Analysis of essential oils from chemotypes of Thymus vulgaris in Catalonia |
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| Authors: | Josep Torras M Dolors Grau Jordi F López F Xavier C de las Heras |
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| Affiliation: | 1. Escola Politècnica Superior d'Enginyeria de Manresa, Universitat Politècnica de Catalunya (UPC), Av Bases de Manresa 61‐73, E‐08242 Manresa, Spain;2. Escola Politècnica Superior d'Enginyeria de Manresa, Universitat Politècnica de Catalunya (UPC), Av Bases de Manresa 61‐73, E‐08242 Manresa, SpainEscola Politècnica Superior d'Enginyeria de Manresa, Universitat Politècnica de Catalunya (UPC), Av Bases de Manresa 61‐73, E‐08242 Manresa, Catalonia, Spain;3. Department of Environmental Chemistry, Institute of Chemical and Environmental Research (CSIC), Jordi Girona, 18. 08034 Barcelona, Spain |
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| Abstract: | Essential oils from aerial parts of Thymus vulgaris have been obtained by hydrodistillation. Their components have been identified by gas chromatography/mass spectrometry. Samples were collected in Catalonia (northeastern Iberian peninsula), specifically in four locations along the Llobregat river basin. Such locations have different altitudes with respect to sea level (1500 m; 700 m; 300 m; 100 m), and have differences in pluvial regime and mean temperature. At 700 m, samples were collected from a transplanted specimen from 1500 m, in order to check the influence of the change in environmental conditions. Two different chemotypes have been characterized. Samples collected at 300 m have a dominant chemotype 1,8‐cineole, with 20% (approx.) essential oil content. The other samples have linalool as dominant chemotype with a 40–70% content, according to vegetative stage. Copyright © 2007 Society of Chemical Industry |
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| Keywords: | Thymus vulgaris L. chemotypes chemical composition essential oils |
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