Origanum vulgare L., Lamiaceae, from six different production areas of China and Pakistan
were analyzed via gas chromatography equipped with a flame ionization detector (GC-FID)
and examined for their volatile constituents by gas chromatography-mass spectroscopy (GCMS).
This procedure allowed the identification of 11 to 46 components among six production
areas, representing 98.5% to 99.9% of the total oil extracted. The yields of the essential oil
of the six production areas of O. vulgare ranged from 0.1 to 0.7%.