Deuterium exchange during acid-demineralisation

Details Deuterium exchange during acid-demineralisation Deuterium exchange during acid-demineralisation

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988gecoa..52.2251k&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 52, Sept. 1988, p. 2251-2255.

Computer Science

3

Demineralizing, Deuterium, Isotopes, Meteoritic Composition, Murchison Meteorite, Acids, Hydrogen Isotopes, Isotope Effect, Organic Compounds

Scientific paper

Isotopic analyses of residues prepared by demineralization of the Murchison meteorite using D-labelled reagents provide evidence for measurable exchange of H-isotopes between residue and reagents. Precise quantification of this effect is precluded by substantial inhomogeneity of the meteoritic organic matter. A conservative estimate of the degree of exchange is 3-5 percent of the H pyrolyzable as H2O. This could affect the shape of the curve defining D release as a function of temperature, but does not change conclusions previously drawn concerning the nature of the bulk D enrichment of insoluble organic matter in meteorites.

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