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A method for oxygen isotope analysis of milligram quantities of water and some of its applications

O'Neil, James R. and Epstein, Samuel (1966) A method for oxygen isotope analysis of milligram quantities of water and some of its applications. Journal of Geophysical Research, 71 (20). pp. 4955-4961. ISSN 0148-0227. doi:10.1029/JZ071i020p04955.

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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.

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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.
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Caltech Division of Geological Sciences1397
Issue or Number:20
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Official Citation:O'Neil, J. R., and S. Epstein (1966), A method for oxygen isotope analysis of milligram quantities of water and some of its applications, J. Geophys. Res., 71(20), 4955–4961, doi:10.1029/JZ071i020p04955.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:51491
Deposited By: George Porter
Deposited On:10 Nov 2014 17:54
Last Modified:10 Nov 2021 19:11

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