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Published:Journal of Chromatographic Science,
ISSN 0021-9665 Volume
47, Number 1, January 2009, pp. 75-82
Multidimensional GC–Fourier Transform Ion
Cyclotron Resonance MS Analyses: Utilizing Gas-Phase Basicities
to Characterize Multicomponent Gasoline Samples
Zhaohui Luo, Caleb Heffner, and Touradj Solouki
Department of Chemistry, University of Maine, Orono, ME 04469
Hydrocarbon isomers, present in crude petroleum,
may yield similar gas chromatography (GC) retention times and
indistinguishable mass spectral patterns. Hence, conventional
GC–mass spectrometry (MS) may not provide sufficient data
for identification of hydrocarbon isomers. Real-time proton affinity
or gas-phase basicity “bracketing” provides an additional
dimension to GC–MS analyses. Our GC–fourier transform
(FT)-ion cyclotron resonance (ICR)-MS yielded an average mass
measurement error of less than 3 ppm for components of a retail
gasoline sample. The combined use of concurrent thermo-chemical
measurements with GC–FT-ICR-MS data analysis allowed differentiation
of various isomers such as C8H10 species.
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