Spatially resolved organic analysis of the Allende meteorite

Details Spatially resolved organic analysis of the Allende meteorite Spatially resolved organic analysis of the Allende meteorite

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989sci...246.1026z&link_type=abstract

Science (ISSN 0036-8075), vol. 246, Nov. 24, 1989, p. 1026-1029.

Computer Science

31

Allende Meteorite, Aromatic Compounds, Chemical Analysis, Hydrocarbons, Laser Spectroscopy, Mass Spectroscopy, Meteoritic Composition, Carbon Dioxide Lasers, Chondrule, Infrared Lasers, Laser Outputs, Mass Spectra, Pulsed Lasers

Scientific paper

The distribution of polycyclic aromatic hydrocarbons (PAHs) in the Allende meteorite has been probed with two-step laser desorption/laser multiphoton ionization mass spectromety. This method allows direct in situ analysis with a spatial resolution of 1 sq mm or better of selected organic molecules. Spectra from freshly fractured interior surfaces of the meteorite show that PAH concentrations are locally high compared to the average concentrations found by wet chemical analysis of pulverized samples. The data suggest that the PAHs are primarily associated with the fine-grained matrix, where the organic polymer occurs. In additon, highly substituted PAH skeletons were observed. Interiors of individual chondrules were devoid of PAHs at the detection limit (about 0.05 ppm).

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