THE UNEXTRACTABLE ORGANIC FRACTION OF THE PUEBLITO DE ALLENDE METEORITE: EVIDENCE FOR ITS INDIGENOUS NATURE
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- P. G. Simmonds
- JET PROPULSION LABORATORY, CALIFORNIA INSTITUTE OF TECHNOLOGY, PASADENA
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- A. J. Bauman
- JET PROPULSION LABORATORY, CALIFORNIA INSTITUTE OF TECHNOLOGY, PASADENA
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- E. M. Bollin
- JET PROPULSION LABORATORY, CALIFORNIA INSTITUTE OF TECHNOLOGY, PASADENA
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- E. Gelpi
- DEPARTMENT OF BIOPHYSICAL SCIENCES, UNIVERSITY OF HOUSTON, HOUSTON, TEXAS
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- J. Oró
- DEPARTMENT OF BIOPHYSICAL SCIENCES, UNIVERSITY OF HOUSTON, HOUSTON, TEXAS
書誌事項
- 公開日
- 1969-11
- DOI
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- 10.1073/pnas.64.3.1027
- 公開者
- Proceedings of the National Academy of Sciences
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説明
<jats:p>The Pueblito de Allende meteorite contains only 0.1-0.5 ppm of solvent-extractable carbon, most or all of which is due to terrestrial contamination. Determinations of the total carbon content gives values from 0.23 to 0.35 per cent. The presumed indigenous insoluble carbon is thus present in a ratio of 2300:1 relative to contaminant carbon. A sample of the meteorite was extracted with a deuterated solvent containing benzene:methanol (4:1 w/w) to remove contaminants and then was subjected to pyrolysis-gas chromatography-mass spectrometry to investigate the nature of the remaining carbon. The pyrolysis products (about 20 ppm) consisted chiefly of aromatic and substituted aromatic hydrocarbons. The pyrolysis results were confirmed by oxidative thermal analysis which showed that the bulk of the carbon present was a macromolecular structure and not graphite. This suggests that an insoluble nongraphitic condensed aromatic polymer is indigenous to the meteorite. The origin and precise chemical structure of this material has not been determined, but it bears a superficial resemblance to coal-like structures.</jats:p>
収録刊行物
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- Proceedings of the National Academy of Sciences
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Proceedings of the National Academy of Sciences 64 (3), 1027-1034, 1969-11
Proceedings of the National Academy of Sciences