Liu Peng, Li Maowen, Sun Yongge, Jiang Qigui, Tao Guoliang, Cao Tingting. Molecular characterization of polar species in Canadian oil sand bitumens by electrospray ionization and high resolution mass spectrometry[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2014, 36(1): 89-94. doi: 10.11781/sysydz201401089
Citation: Liu Peng, Li Maowen, Sun Yongge, Jiang Qigui, Tao Guoliang, Cao Tingting. Molecular characterization of polar species in Canadian oil sand bitumens by electrospray ionization and high resolution mass spectrometry[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2014, 36(1): 89-94. doi: 10.11781/sysydz201401089

Molecular characterization of polar species in Canadian oil sand bitumens by electrospray ionization and high resolution mass spectrometry

doi: 10.11781/sysydz201401089
  • Received Date: 2013-02-22
  • Rev Recd Date: 2013-12-02
  • Publish Date: 2014-01-28
  • At present, biodegradation effect on saturated hydrocarbon biomarkers, aromatic biomarker parameters and low molecular weight nitrogen compounds and their parameters is mostly studied, with less attention paid to the research of high molecular weight polar compounds. Four genetically related Canadian oil sand bitumens with various biodegradation levels have been analyzed by negative-ion electrospray ionization (ESI) and Fourier transform-ion cyclotron resonance mass spectrometry (FT-ICR MS). The results show that the neutral nitrogen and acidic heteroatom compounds in the oil sand bitumens include N1,N1O1,N1O2,N1S,O1,O1S1,O2,O2S1,O3 and O4 heteroatom classes, among which the O2 class species are most abundant. With increasing biodegradation, the relative abundances of N1,N1O1 and O1 class species decrease slightly, while the relative abundances of O2 and O2S1 class species increase slightly. The advantage of high resolution mass spectrometry for analyzing high molecular weight polar compounds in crude oil indicates great potential for developing new petroleum geochemistry techniques.

     

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