title: Supercritical CO2 extraction of essential oils from Chamaecyparis obtusa.
abstract: Supercritical carbon dioxide (SC-CO2) extraction and hydrodistillation (HD) were used to determine the essential oil composition of the trunks and leaves of Chamaecyparis obtusa. The optimal extraction conditions for the oil yield within the experimental range of variables examined were temperature 50 degrees C, pressure 12 MPa, carbon dioxide flow rate 40 mL/min and extraction time 90 min. The maximum measured extraction yield was 2.9%. Entrainer solvents, such as methanol in water, had no additional effect on the extraction of essential oils. The chemical composition of the essential oils was analyzed by GC-MS. The major components were alpha-terpinyl acetate (>10.9%), 1-muurolol (>13.2%) and elemol (>8.1%). Sesquiterpenoids formed the major class of compounds present.
authors.affiliation: College of Food Science, Shanghai Ocean University, No. 999 Huchenghuan Road, Lingang New City, Nanhui District, Shanghai 201-306, China.
authors.forename: Yinzhe
authors.initials: Y
authors.lastname: Jin
authors.forename: Dandan
authors.initials: D
authors.lastname: Han
authors.forename: Minglei
authors.initials: M
authors.lastname: Tian
authors.forename: Kyung-Ho
authors.initials: KH
authors.lastname: Row
mesh_terms: D002245:Carbon Dioxide / Q000737:chemistry; D029780:Chamaecyparis / Q000737:chemistry*; D025924:Chromatography, Supercritical Fluid; D008401:Gas Chromatography-Mass Spectrometry; D007202:Indicators and Reagents; D007723:Korea; D009822:Oils, Volatile / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry; D012717:Sesquiterpenes / Q000737:chemistry; D012997:Solvents; D014934:Wood / Q000737:chemistry
chemical_list: D007202:Indicators and Reagents; D009822:Oils, Volatile; D012717:Sesquiterpenes; D012997:Solvents; D002245:Carbon Dioxide