CHEMICAL EXAMINATION OF SOME PETROLEUM SOURCE ROCKS BY LASER PYROLYSIS MASS-SPECTROMETRY AND FLASH PYROLYSIS-GAS CHROMATOGRAPHY MASS-SPECTROMETRY

PF GREENWOOD, N SHERWOOD, Gary D WILLETT

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Abstract

A combination of laser desorption and electron impact (LD-EI) ionisation enables a novel mass spectrometric study of a suite of potential petroleum source rocks and related samples. Comparision of the LD-EI mass spectrometric data with gas chromatography mass spectrometric data from flash pyrolysis reveals that structurally relevant products are detected from both types of experiments. The relative concentrations of the predominant products allows assessments of the aliphatic and aromatic contents of the organic matter in the samples.

The detailed information provided directly by LD-EI mass spectrometry, without gas chromatography, demonstrates that the technique offers a rapid, comprehensive method for organic geochemical analyses of preserved organic matter in rocks.

Original languageEnglish
Pages (from-to)177-202
Number of pages26
JournalJournal of Analytical and Applied Pyrolysis
Volume31
DOIs
Publication statusPublished - Feb 1995

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