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Comparing Laser Desorption Ionization and Atmospheric Pressure Photoionization Coupled to Fourier Transform Ion Cyclotron Resonance Mass Spectrometry To Characterize Shale Oils at the Molecular Level

Energy & Fuels

By:
, , , , , ,
DOI: 10.1021/ef3015662

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Abstract

Laser desorption ionization (LDI) coupled to Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) was used to analyze shale oils. Previous work showed that LDI is a sensitive ionization technique for assessing aromatic nitrogen compounds, and oils generated from Green River Formation oil shales are well-documented as being rich in nitrogen. The data presented here demonstrate that LDI is effective in ionizing high-double-bond-equivalent (DBE) compounds and, therefore, is a suitable method for characterizing compounds with condensed structures. Additionally, LDI generates radical cations and protonated ions concurrently, the distribution of which depends upon the molecular structures and elemental compositions, and the basicity of compounds is closely related to the generation of protonated ions. This study demonstrates that LDI FT-ICR MS is an effective ionization technique for use in the study of shale oils at the molecular level. To the best of our knowledge, this is the first time that LDI FT-ICR MS has been applied to shale oils.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Comparing Laser Desorption Ionization and Atmospheric Pressure Photoionization Coupled to Fourier Transform Ion Cyclotron Resonance Mass Spectrometry To Characterize Shale Oils at the Molecular Level
Series title:
Energy & Fuels
DOI:
10.1021/ef3015662
Volume
27
Issue:
4
Year Published:
2013
Language:
English
Publisher:
ACS Publications (American Chemical Society)
Publisher location:
Washington, DC
Contributing office(s):
Central Energy Resources Science Center
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
1830
Last page:
1837
Number of Pages:
8
Additional Online Files(Y/N):
N