Abstract
A large number of aromatic and hydroaromatic hydrocarbons were detected by gas chromatography and mass spectrometry from the bituminous coals. A minor part consists of saturated aliphatic hydrocarbons in which the distribution of normal alkanes in the range C24 to C32 shows a similarity to that of recent plant material with an odd/even distribution rate higher than one. A relatively high amount of pristane is present which is not known in higher plants. A heterocyclic compound, dibenzofuran, was isolated and characterized, and a methyl dibenzofuran seems to be present. Monoterpenoid compounds and minor amounts of acids were detected; myristic and palmitic acids were characterized as methyl esters. The coal is derived from the Kap Stewart Formation which bears a well-known fossil flora dominated by gymnospermous plants and without angiosperms. Some of the extracted organic compounds are present in recent gymnosperms. In recent material dibenzofuran and derivatives are only known in lichens and one angiospermous species.
Highlights
21. AnalyslThis Bruddal eoal seam has been mined, but less eXlensively, and il was possible in september 1970 to obtain a sample af the coul at this localilY
The coal is derived from the Kap Stewart Formation which bears a well known fossil flora dominated by gymnospermous plants and without angiosperms
No angiospcrms afC found in the Kap Stewart Formation
Summary
This Bruddal eoal seam has been mined, but less eXlensively, and il was possible in september 1970 to obtain a sample af the coul at this localilY The instruments used for Ihe analytical work were a Perkin·EJmer 880 gas chromatograph, cquippcd with a 2 m IO per cent S.E. 30 gas· chrom Z column, and a Hitachi·Perkin·Elmer RMU·6D mass speclrorneter, and a Bedemann GC-M gas chromalograph in combination with a eEC 21-104 mass spcctrometer for part of the work Single compounds such as dibcnzofuran and pyrene were isolatcd by the use of thin layer chromatography. In addition the ultra·violet spectra and the gas chromatography data agrced well with the commcrcial compounds
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