Determination of hopane biomarkers in Arabian crude oils by gas chromatography-tandem mass spectrometry |
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| Authors: | Ding-Ping Lin Emmanuel Y Osei-Twum Luis A Litorja Nureddin M Abbas |
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| Institution: | Central Analytical and Materials Characterization Laboratories, Research Institute, King Fahd University of Petroleum and Minerals, Dhahran 31261 Saudi Arabia |
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| Abstract: | Gas chromatography-mass spectrometry with the mass spectrometer operated in the tandem mode at a constant accelerating voltage was used to analyse for triterpanes in Arabian crude oils. Specific molecular parent-daughter ion pairs were selected for quantitative measurements owing to their metastable transitions in the first field-free region. More accurate relative distribution ratios of hydrocarbon biomarkers were determined by this sequential gating technique than by the conventional diagnostic daughter ion mass fragmentogram in common GC-MS. The data and spectra obtained from MS-MS operation may serve as unique “fingerprints” for these regional crudes |
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| Keywords: | Biomarkers Hopanes Petroleum Triterpanes |
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