earticle

영어

Torreya nucifera S. et Z. (Torreya) is a slow-growing coniferous tree native to South Korea's Jeju Island and to southern Japan. Its leaves are evergreen, needle-like, 2～3 cm long and 3 mm broad, with a sharply spined tip and two whitish stomatal bands on the underside. The torreya oil was used for edible, hair, lighting, and medical purposes. Recently, the usage of this oil is drawing attention in the cosmetics and fragrance industry. Thus this study focused on extraction of Jeju torreya using supercritical carbon dioxide (SCO2). The leaves of Jeju torreya were sampled (3 kg), air-dried, and chopped. Then, the essential oil was extracted using SCO2, maintaining a pressure and a temperature as 350 bar and 60 ℃, respectively. Analysis of the chemical composition of essential oil from Jeju torreya leaves was carried out using gas chromatography mass (GC/MS). As a result, the optimum yield of SCO2 extraction was found as 1.5 %. And more than 80% of the total oil components were identified, with Cyclotetrasiloxane, Dehydroabietic acid and Pyrido[2,3-b]indole as the main compounds in essential oil from Jeju torreya leaves. These results indicate that SCO2 extraction can be developed to be an eco-friendly process for obtaining the valuable essential oils such as Jeju torreya oil.