Author(s):

Itmad Awad Elhassan, Ikram Mohamed Eltayeb, Ekram Babiker Khalafalla

Abstract: Cymbopogon (Poaceae) represents an important genus of about 140 species that grow in tropical and subtropical regions around the world. They have diverse uses in pharmaceutical, cosmetics, food and flavor, and agriculture industries. The essential oils from C. citratus leaves, C. nervatus inflorescences, C. proximus leaves and C. proximus inflorescence were prepared usingrnhydrodistillation method. The percentage yield and the physical properties of the oils were determined, The essential oils were analyzed for identification of their chemical composition using GC-MS technique. Piperitone (43.2, 45.8%), elemol (13.45, 14.43%), 4-carene (7.55, 9.75%), β - eudesmol (5.41, 4.32%), limonene (2.45, 4.03%) and α- eudesmol (2.61, 4.66%), β-elemene (2.24, 1.30%) were the main components identified in the essential oil of C. proximus leaves and inflorescence, respectively. The main constituents identified in C. nervatus inflorescence essential oil were α- verbenol (20%), trans-pincarveol (19.41%), trans- p- menthe-2,8- dien-ol (14.14), d-Limonene (8.49%), cis-piperitol (8.46%), cyclohexanol-2- methylene -5- (1-methyl ethenyl) (8.32%), 2-cyclo pentyl- cyclopentanone (7.28%) and carvone (4.58%), whereas the main identified constituents in C. citratus essential oil were citral, which is a mixture of the stereoisomer geranial (32.74%) and neral (26.23%), β-pinene (9.36%) and Geraniol (4.47%). The essential oils distilled from Cymbopogon species, C. citratus leaves, C. proximus leaves, C. proximus inflorescences and C. nervatus inflorescences, revealed different chemical composition, but they shared a common feature, that their major constituents were oxygenated monoterpenes among the other terpenoid classes.

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