经过GC-MS检测三种桉树挥发油的化学成分，在共有成分中，含量最高的成

GC-MS after three kinds of the chemical analysis of eucalyptus essential oil component in the total content of the component having the highest α- pinene and 1,8-cineol, this study α- pinene and 1,8-cineol single standard confirmation. Three kinds of the volatile oils of eucalyptus and contents quite different, and the highest Eucalyptus grandis leaf volatile oil component content is eucalyptol, accounting for 59.55% and 50.49%, while Eucalyptus Essential Oil component having the highest content of α- pinene (41.91%).

After GC-MS testing the chemical composition of three eucalyptus volatile oils, the highest content of alpha-pyrene and 1,8-argon oil essentials in the common ingredients, the study of alpha-pyrene and 1,8-oil oil concentrate skewed. The composition and content of the three eucalyptus volatile oils vary greatly, and the highest content in blue eucalyptus and giant eucalyptus volatile oil is eucalyptus oil, which accounts for 59.55% and 50.49% respectively, while the highest content in the large leaf volatile oil is alpha-pyrene (41.91%).

The chemical components of three kinds of Eucalyptus volatile oil were detected by GC-MS. among the common components, α - pinene and 1,8-cineole were the highest. In this study, α - pinene and 1,8-cineole were confirmed by single standard. The components and contents of the three kinds of Eucalyptus volatile oil are quite different. Eucalyptus globulus and Eucalyptus grandis have the highest content of Eucalyptus olein, accounting for 59.55% and 50.49% respectively, while Eucalyptus grandis has the highest content of α - pinene (41.91%).