title: [Orthogonal experiment using SFE-CO2 in extraction of essential oil from fresh Houttuynia cordata and analysis of essential oil by GC-MS].
abstract: OBJECTIVE
  To optimize the extraction procedure of essential oil from H. cordata using the SFE-CO2 and analyze the chemical composition of the essential oil.
  
  
  METHODS
  The extraction procedure of essential oil from fresh H. cordata was optimized with the orthogonal experiment. Essential oil of fresh H. cordata was analysed by GC-MS.
  
  
  RESULTS
  The optimize preparative procedure was as follow: essential oil of H. cordata was extracted at a temperature of 35 degrees C, pressure of 15,000 kPa for 20 min. 38 chemical components were identified and the relative contents were quantified.
  
  
  CONCLUSIONS
  The optimum preparative procedure is reliable and can guarantee the quality of essential oil.
authors: School of Chinese Medicine of Hong Kong Baptist University, Hong Kong, China.
authors: Jiang
authors: J
authors: Meng
authors: Xiao-ping
authors: XP
authors: Dong
authors: Yi-sheng
authors: YS
authors: Zhou
authors: Zhi-hong
authors: ZH
authors: Jiang
authors: Kelvin Sze-Yin
authors: KS
authors: Leung
authors: Zhong-zhen
authors: ZZ
authors: Zhao
mesh_terms: D000447:Aldehydes / Q000032:analysis / Q000737:chemistry; D002245:Carbon Dioxide / Q000737:chemistry; D025924:Chromatography, Supercritical Fluid / Q000379:methods; D005612:Freeze Drying; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D052859:Houttuynia / Q000737:chemistry*; D007659:Ketones / Q000032:analysis* / Q000737:chemistry; D009822:Oils, Volatile / Q000032:analysis* / Q000737:chemistry; D035261:Plant Components, Aerial / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry; D011312:Pressure; D013696:Temperature
chemical_list: D000447:Aldehydes; D007659:Ketones; D009822:Oils, Volatile; D002245:Carbon Dioxide; C023969:decanoyl acetaldehyde; C526928:undecan-2-one