| The chemical components of essential oil from the flowers of Edgeworthia chrysantha Lindl. of Edgeworthia of Thymelaeaceae were analyzed by GC - MS in this paper. The volatile components were extracted by diethyl ether, then isolated by steam distillation method. Their chemical compositions and relative contents were analyzed using GC - MS with the condition of chromatogram of HP - 5 5% phenyl methyl siloxane capillary column(30 m × 0. 25 mm × 0. 25 μn).The carrying gas was helium, the velocity of flow was 1 mL/min and the temperature was in rate of 8 ℃/min from 30 ℃ (hold 5 min) to 120 ℃, then in rate of 20 ℃/min from 120℃ to 240℃ (kept 10 min). And with the condition of mass spectrum of EI ionization, the energy of ionization was 70 eV, the ionization temperature was 230 ℃. and the spectrum range of the scan was 30-460 u. As a result, sixty-two volatile compounds of Flos Edgeworthlae were identified , which comprised 60. 14% of volatile fraction. The main components include alkylv, alkene, aromatic ring, ketone, aether, hydroxybenzene, mellow, aldehyde, acid and ester, which have good value in industry of chemistry and medicine One nitrogenous configurations; decane, 1, 1' -oxybis-;7-pentadecene7-bromomethyl- and tert-Hexadecane--thiol were especial components.Our results indecate the analytical method of GC-MS is reliable, stabilize and repeatability, therefore this method can be applied to theanalysis of the essential oil components extracted from Flos Edgeworthlae components. Besides, the different aroma constituents were compared to those early reported before. Finally, a review on chemical components of Edgeworthia chrysantha Lindl and an important role played by secondary metabolites of plants in chemical ecology was presented. It will be an essential proof of experiment and theory to further explore this plant.
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