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Determination of Rubidium in Cesium Metal by X-Ray Fluorescence Spectroscopy

Published online by Cambridge University Press:  06 March 2019

Roger D. Laib
Roger D. Laib*
Affiliation:
U.S. Industrial Chemicals Co. Cincinnati, Ohio
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Abstract

A rapid method for the determination of rubidium in cesium metal by X-ray fluorescence is described. Cesium metal is converted to the chloride, and pellets are pressed with molybdenum trioxide as an internal standard. The rubidium to molybdenum intensity ratio is used to eliminate the effect of small amounts of the other alkali metals. The analytical curve is linear from 0.05 to 15% rubidium, which covers the range of samples normally encountered. Rubidium can be determined with a coefficient of variation of 1.3% in this range. Good agreement was shown with results obtained by flame photometry.

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 8: Thirteenth Annual Conference on Applications of X-ray Analysis, August 12-14, 1964 , 1964 , pp. 443 - 447
Copyright
Copyright © International Centre for Diffraction Data 1964

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References

1. Farquhar, M. C. and Hill, J. A., “Analysis of Cesium and Rubidium Salts and Metals,” Anal. Chem. 34: 222, 1962.Google Scholar
2. Okada, Minoru, “Rapid Determination of Rubidium in Cesium Nitrate by Neutron Activation,” Nature 198: 577, 1963.Google Scholar
3. Axelrod, J. M. and Adler, I.. “X-Ray Spectrographic Determination of Cesium and Rubidium,” Anal. Chem. 29:1280–1281, 1957.Google Scholar