title: Chemical characterisation of the different types of volatile oil constituents by various solute retention ratios with the use of conventional and novel commercial gas chromatographic stationary phases.
abstract: Retention ratios of an unknown solute peak from a volatile oil can help to identify its chemical type. Relative retentions on conventional stationary phases can be used to calculate a polar/non-polar ratio which may suggest it is an aromatic solute or a sesquiterpene hydrocarbon. With dipentyl (DA) cyclodextrin phases, gamma-DA/alpha-DA ratios can indicate a bicyclic or monocyclic monoterpenoid. Temperature change on alpha-DA can pick out a non-alcoholic saturated cyclic monoterpenoid, using 150/125 degrees C. Twenty retention ratios are reviewed involving various phases, including other modified cyclodextrins, liquid crystals, "Chirasil-Val" and crown ethers. Applications to six volatile oils are made using a variety of phases.
authors.affiliation: School of Pharinacy, Curtin University of Technology, GPO Box U1987, Perth, Western Australia 6845, Australia. tjbetts@ozemail.com.au
authors.forename: T J
authors.initials: TJ
authors.lastname: Betts
mesh_terms: D002849:Chromatography, Gas / Q000295:instrumentation*; D009821:Oils / Q000032:analysis*; D014835:Volatilization
chemical_list: D009821:Oils