title: [Supercritical fluid extraction of beta-elemene under lower pressure].
abstract: A method has been developed for the extraction and analysis of the active component beta-elemene from Rhizoma Atractylodis Macrocephalae by supercritical fluid extraction with CO2 containing ethanol. The article discusses some factors such as pressure, temperature and modifier that affect the selectivity. Class-selective extraction has been performed by varying the pressure. beta-Elemene could almost be extracted completely at lower pressure (12.0 MPa) and its relative amount was raised from 4.8% under higher pressure to 8.0% for lower pressure.
authors.affiliation: Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
authors.forename: S L
authors.initials: SL
authors.lastname: Chen
authors.forename: J
authors.initials: J
authors.lastname: You
authors.forename: G J
authors.initials: GJ
authors.lastname: Wang
mesh_terms: D031174:Atractylodes / Q000737:chemistry*; D025924:Chromatography, Supercritical Fluid / Q000379:methods*; D018517:Plant Roots / Q000737:chemistry; D011312:Pressure; D012717:Sesquiterpenes / Q000032:analysis*
chemical_list: D012717:Sesquiterpenes; C445979:beta-elemene