title: [Study of components in crude drugs by head space gas chromatography. I. Components of Asiasari radix].
abstract: Determinations of volatile components of essential oil contained in Asiasari Radix were studied by head space gas chromatography. The head space gas, which was generated by heating 0.2 g of crude drug with 1.0 ml of water at 90 degrees C for 45 min, was analyzed directly by gas chromatography or gas chromatography-mass spectrometry. This method was rapid, and did not require tedious procedures and time consuming, and without contamination of the column.
authors.affiliation: Faculty of Pharmaceutical Science, Kinki University, Osaka, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Oka
authors.forename: K
authors.initials: K
authors.lastname: Otsuki
authors.forename: M
authors.initials: M
authors.lastname: Katagi
authors.forename: H
authors.initials: H
authors.lastname: Tsuchihashi
mesh_terms: D002849:Chromatography, Gas / Q000379:methods*; D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D009822:Oils, Volatile / Q000032:analysis*
chemical_list: D004365:Drugs, Chinese Herbal; D009822:Oils, Volatile