A method for oxygen isotope analysis of milligram quantities of water and some of its applications
- Creators
- O'Neil, James R.
- Epstein, Samuel
Abstract
A method has been developed by which bromine pentafluoride and small amounts of water are reacted in a nickel vessel at 80°C to liberate oxygen in 100% yield. The oxygen is converted to CO_2, which is analyzed on an isotope ratio mass spectrometer. The oxidation reaction takes place instantaneously, and the conversion of the liberated O to CO_2 requires approximately 15 minutes. There are no measurable memory effects in the method and the reproducibility is ±0.1‰. A value of 1.0407 was determined for the CO_2-H_2O fractionation factor at 25°C, a number necessary for relating standards in use by various workers. This value is in exact agreement with that obtained by Compston and Epstein in the same laboratory using a reduction technique but is in serious disagreement with values determined by other workers. An application of this technique has been made to the study of a meteorological problem.
Additional Information
Copyright 1966 by the American Geophysical Union. (Manuscript received May 5, 1966; revised June 27, 1966.) We thank Mr. Curtis Bauman for his help in the design and construction of the apparatus, Mr. Samuel Lee for performing the CO_2 equilibrations, and Messrs. Samuel Savin and Paul Yanagasawa for their analyses of copper oxide. California Institute of Technology Contribution 1397.Attached Files
Published - jgr4916.pdf
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Additional details
- Eprint ID
- 51491
- Resolver ID
- CaltechAUTHORS:20141110-094434726
- Created
-
2014-11-10Created from EPrint's datestamp field
- Updated
-
2021-11-10Created from EPrint's last_modified field
- Other Numbering System Name
- Caltech Division of Geological Sciences
- Other Numbering System Identifier
- 1397