**8. Obtaining essential oils**

Essential oils can be obtained from plant material by three main methods [47] view **Figure 1**.

#### **Figure 1.**

*Obtaining essential oils by entrainment with steam (external source of steam, e.g., boiler); distillation with water vapor (wet steam obtained by heating the water to its vigorous boiling); and hydrodistillation (heating of the water with the submerged plant material, generally very delicate, for example, flowers).*
