Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 106, Issue 14, Pages 5493-5496Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.0812755106
Keywords
oxygen; nitrate; nitrite; oxidation
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Understanding the internal distribution of anomalous'' isotope enrichments has important implications for validating theoretical postulates on the origin of these enrichments in molecules such as ozone and for understanding the transfer of these enrichments to other compounds in the atmosphere via mass transfer. Here, we present an approach, using the reaction NO2- + O-3, for assessing the internal distribution of the Delta O-17 anomaly and the delta O-18 enrichment in ozone produced by electric discharge. The Delta O-17 results strongly support the symmetry mechanism for generating mass independent fractionations, and the delta O-18 results are consistent with published data. Positional Delta O-17 and delta O-18 enrichments in ozone can now be more effectively used in photochemical models that use mass balance oxygen atom transfer mechanisms to infer atmospheric oxidation chemistry.
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