Analysis on Chemical Constituents of Essential Oil from Ziziphora clinopodioides Lam. by GC/MS

The essential oil of Ziziphora clinopodioides Lam. from three specimens was extracted using steam distillation.The chemical components of the essential oil were analyzed by GC/MS. 10, 16 and 19 components are identified from three specimens,which accounted for 99.63%, 99.70% and 99.28% of volatile fraction， respectively. The major components are pulegone and menthone, which accounted for 89.02%(Yamalike Hill at Urumqi), 83.51%(southern suburbs of Urumqi)and 87.11%(Horm rural Buerjin county of Xinjiang). Others are isomenthone, piperitenone,isopulegone and limonene et al.