Mass spectral characteristics of C19 and C20 tricyclic terpanes detected in Latrobe Tasmanite oil shale

Paul F. Greenwood*, Simon C. George

*Corresponding author for this work

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The saturated tricyclic terpane composition of the solvent-extractable hydrocarbon fraction of Latrobe Tasmanite oil shale has been investigated. A homologous series of the usual cheilanthane tricyclic terpanes, including several C20-C30 13(H),14(H) stereoisomers, was detected, together with several novel C19 and C20 tricyclic terpanes. Classical and metastable daughter scan 70 eV mass spectra for six C19 tricyclic terpanes and ten C20 tricyclic terpanes are reported here, including a number of isomers for the first time. The mass spectral and gas chromatographic data distinguish the unknown tricyclic terpane isomers from previously characterised cheilanthanes, which have been widely reported from molecular studies of Tasmanite material. Several mass spectral trends are consistently observed between all detected tricyclic terpanes, suggesting a close cheilanthane-related structural affinity.

Original languageEnglish
Pages (from-to)221-230
Number of pages10
JournalEuropean Journal of Mass Spectrometry
Volume5
Issue number3
Publication statusPublished - 1999
Externally publishedYes

Keywords

  • Biomarkers
  • Cheilanthanes
  • Mass spectrometry
  • Tasmanite oil shale
  • Tricyclic terpanes
  • Tricyclics

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