OBJECTIVE To study the variations on percentage content and chemical components of essential oils from dry and fresh Mosta
Punctulata METHODS The percentage contents of essential oils were assaied by steam distillation, and the chemical components were analyzed by means of GC/MS/DS combination RESULTS
Mosta Punctulata essential oils yields:dry Mosta Punclulata 1 502%～1 760% , fresh Mosta Punctulata 0 345%～0 365% 114 seperated peaks were found in essential oils from fresh Mosta Punctulata,65 of them which make up 97 85% of the total essentital oil were identified 41components among them were first found in this paper The major components were methyleugenol (64 935%), caryophllene(9 333%), humulene(6 455%), β farnesene(4 638%), thujone(3 238%), sabinene(1 586%), myristicin(1 374%) 142 seperated Peaks were found in
essential oil from dry Mosta Punctulata,60 Components among them were identified.CONCLUSION The essential oils percentage contents of dry and fresh Mosta Punctulata have obvious difference, but their chemical components are nearly identical Whereas the contents of most components of essential oil from dry Mosta Punctulata decrease universally The essential oils of Mosta Punctulata have many types of biological active mass such as eucalyptol has antibacterial function,thujone has antitussive function,methyleugenol has anodyne function and some components can be used as enhance and flavour. Especially the methyleugenol content comes to 64 935% So they have potential application development value