Essential oil is refined extraction of volatile aromatic matter from plants, flowers, leaves, stems, roots or fruit, which through steam distillation, extrusion, cold soak or solvent extraction methods.
Essential oil divide into two different kinds, compound essential oils and pure essential oil. Essential oils are highly volatile, it will evaporate quickly when exposed to air. Because of this reason, it must be sealed oil bottle storage. Once opened, it also need to cover back quickly.
Not all plants can refine essential oil, only plant with balsam gland can produce the oil. The distribution of different plant balsam gland have distinction among petals, leaves, roots or trunk. After refining the balsam gland, it becomes essential oil.
Essential oil include many different ingredients, some essential oil like rose is combine with 250 different molecules. Oil is lipophilic, easy to dissolve in lipid. Because the molecular chains of essential oils are usually relatively short, which makes them easy to penetrate the skin, and into the body through rich capillaries.
Essential oil is composed of small molecule, these high-volatile substances can be absorbed into the body by tissue of the nasal mucosa, the message will be sent directly to the brain through limbic system of brain, and then regulate the emotion and physiological functions of the body. Therefore, essential oils can enhance physical and mental performance in aromatherapy.
Each plant oil has a chemical structure to determine its aroma, color, mobility and ways of system operation, which also makes each essential oil has separate special feature characteristic.
Essential oil consist of terpenes, aldehydes, esters, alcohols and other chemical molecules. Because of the high mobility, it called oil, but it is different from the vegetable oil we see in our daily life. The main ingredient of vegetable oil are triglycerides and fatty acid.
Essential oil also divide into four grade: Chianti dew, dew or pure flower water, Perfume grade, Food grade, pure essential oils. Next time we will talk these grades in details.
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