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Direct Determination of Niobium in Uranium-Niobium Alloys*

Published online by Cambridge University Press:  06 March 2019

Jack L. Long
Jack L. Long*
Affiliation:
Rockwell International, Rocky Flats Plant, P.O. Box 464, Golden, Colorado 80401
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Abstract

A procedure for determining niobium in uranium-niobium binary alloys was developed. The procedure requires only that a compact be made by pressing turnings, and wet chemical treatment is avoided entirely. By eliminating the wet chemistry, time is reduced by a factor of at least three compared with previous practice.

Standardization was accomplished by separating each batch of machined turnings from specially cast uranium-niobium alloys into individual strands. A composite portion of each strand was analyzed for niobium by wet chemistry. The balance of the turnings from each batchy was pressed into a compact. Seven standard compacts resulted. The average Intensity ratio of niobium-to-uranium vs. the percent niobium for fourteen determinations on each standard compact was used to calculate a correlation coefficient of 0.999.

The standard deviation of the Intensity ratios between duplicate compacts (average of 52 samples) was less than the standard deviation found between aqueous duplicates (average 125 samples) by a factor of 4.

Type
Other XRF Applications
Information
Advances in X-Ray Analysis , Volume 23: Twenty-Eighth Annual Conference on Applications of X-ray Analysis, July 30 - August 3, 1979 , 1979 , pp. 177 - 183
Copyright
Copyright © International Centre for Diffraction Data 1979

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Footnotes

*

Work performed under Department of Energy Contract.

References

1. Kallman, S., “Treatise on Analytical Chemistry,” Part II, Vol. 6, Kolthoff, I. M., Elving, P. J., and Sandell, E. B., eds., Interscience Publishers, New York (1964) p. 232.Google Scholar
2. Private communication from Anderson, D. P., Rockwell International Golden, Colorado.Google Scholar
3. White, E. W. and Johnson, G. G. Jr., “X-Ray and Absorption Wavelengths and Two—Theta Tables,” A.S.T.M. Committee E—2, Philadelphia, Pennsylvania (1970).Google Scholar