Résumé: The monoterpenic biogenic volatile organic compounds (BVOCs) in ambient air around either Eucalyptus globulus, Cedrus atlantica and Pinus halepensis trees from El: Hamma Botanical Garden (Algiers) or from Pinus halepensis trees field located in Bab:Ezzouar (suburb of Algiers) was qualitatively and semi:quantitatively evaluated. The sampling was carried out in ambient air by adsorption through an activated charcoal cartridge followed by the carbon disulfide extraction. The solution was subjected to high-resolution gas chromatography (HRGC) analysis in programmed temperature. The identification of the components was established by the means of retention Kovats indexes. The use of a [beta]-cyclodextrin chiral capillary column allowed a good separation of monoterpenic enantiomers released in the atmosphere. The enantiomeric ratio provided a good insight into the enantiomeric compound preferentially emitted by plants.

Langue: Anglais