Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1233888 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2008 | 4 Pages |
Abstract
We have used two-color resonant two-photon ionization (2C-R2PI) mass spectrometry to discriminate between isomers of polycyclic aromatic hydrocarbons in the Murchison meteorite. We measured the 2C-R2PI spectra of chrysene and triphenylene seeded in a supersonic jet by laser desorption. Since each isomer differs in its R2PI spectrum, we can distinguish between isomers using wavelength dependent ionization and mass spectrometry. We found both chrysene and triphenylene in sublimates from carbonaceous residue obtained by acid demineralization of the Murchison meteorite. Their R2PI mass spectra show only the molecular ion, even though these samples contain a complex inventory of organic molecules.
Keywords
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Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Michael P. Callahan, Ali Abo-Riziq, Bridgit Crews, Louis Grace, Mattanjah S. de Vries,