Chemical composition of the essential of Thymus numidicus Poiret

摘要

The essential oil of Thymus numidicus Poiret an endemic Algerian species was obtained by steam distillation and identified by GC and GC-MS. 48 components were determined. The oxygenated terpenoidic components constituted the most important fraction (71.7% ) while the non oxygenated fraction represented 26.2%. The major components were thymol ( 54.1%) followed by p-cymene (15,3%), linalool (5.4%) , carvacrol (3.8%), thymoquinone (3.7%) , a - pinene (2%), thymol methylether ( 1.7%) and b-caryophyllene (1.8%). Our result differ slightly from the few previous studies on this species and showed a relatively high proportion of p-cymene 15.3%) , a-pinene ( 2%) and hydrocarbonated sesquiterpenic fraction (4.6%) in comparison with the other samples studied previously