Essential oil ofArtemisia scoparia
The chemical composition of the essential oil of oriental wormwood growing in Kazathstan has been investigated. Of the components of the oil, 28 have been identified, and the structure of an acetylenic hydrocarbon has been refined.
Essential oils and their constituents : XXXII. Gas chromatography of sesquiterpene hydrocarbons☆
Abstract Characteristic gas chromatographic criteria of identity are reported for 34 authenticated sesquiterpene hydrocarbons, using Reoplex 400, silicone nitrile XE-60 and silicone rubber SE-30 as column substrates and naphthalene, 2-methylnaphthalene and acenaphthene as internal reference standards. The value of the experimental data is demonstrated by application to the analysis of essential oils and correlation with characteristic structural features of some sesquiterpenes. The occurrence of ylangene, α-bergamotene and δ-cadinene in oil of copaiba balsam is reported for the first time.
COLUMN AND GAS CHROMATOGRAPHIC ANALYSIS OF OIL OF WILD GINGER: IDENTIFICATION AND ESTIMATION OF SOME NEW CONSTITUENTS
Oil of wild ginger was found to contain the following as yet unreported constituents: β-pinene, Δ3-carene, β-caryophyllene, ar-curcumene, linalool, borneol, and α-terpineol. The presence of three ketones, one of them readily generated during gas chromatographic analysis from a non-ketonic sesquiterpenoid, was also demonstrated. Formation of a sesquiterpene alcohol as a compositional artefact of the oil occurred during column chromatography over alumina.