Résumé:
The chemical compositions of the essential oils obtained from the aerial parts (leaves) of Cymbogopogn schoenanthus and Origanum majorana L, grown in Eastern Algeria (35 24'15" N and 8 7'27" E), by hydrodistillation was carried out using gas chromatography-mass spectrometry (GC-MS) analysis. The components obtained were identified. The most important compound detected in leaves of Cymbopogon proxima L was 4-isopropyl-1-methyl-2-cyclohexen-1-ol (cis)(15%) and most important compound detected in leaves of Origanum majorana L was p-menth-1-en-4-ol,(R)(21%).