Analysis of hydrocarbons in coal and rock samples by on-line combination of thermodesorption,gas chromatography and mass spectrometry |
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| Authors: | W Püttmann C B Eckardt R G Schaefer |
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| Institution: | 1. Lehrstuhl für Geologie, Geochemie und Lagerst?tten des Erd?ls und der Kohle, RWTH Aachen, Lochnerstra?e 4-20, 5100, Aachen, FRG
2. Institut für Erd?l und Organische Geochemie, KFA Jülich GmbH, Postfach 19 13, 5170, Jülich, FRG
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| Abstract: | Summary GC-MS analysis of hydrocarbons, thermally mobilized from rock and coal samples (“thermodesorption”) at 320°C, provides valuable
and readily available information of organic geochemical significance. Two oil shale and three coal samples of different rank
have been selected for this study. The molecular patterns of compound classes of various saturated and aromatic hydrocarbons
are recorded here by employing mass chromatography of selected ions. The method described is of particular importance for
the detection of those volatile constituents in coals and sedimentary rocks, which are usually not recovered during elaborate
workup procedures (i.e. solvent extraction, liquid chromatography) due to evaporation losses. |
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| Keywords: | Thermodesorption Gas chromatography-mass spectrometry Organic geochemistry Hydrocarbons in coals (C6− C33) Hydrocarbons in shales (C10− C34) |
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