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X-Ray Fluorescence Analysis of Tungsten-Molybdenum Metals and Electrolytes

Published online by Cambridge University Press:  06 March 2019

K. R. Stever ,
J. L. Johnson  and
H. H. Heady
K. R. Stever
Affiliation:
U. S. Bureau of Mines, Reno, Nevada
J. L. Johnson
Affiliation:
U. S. Bureau of Mines, Reno, Nevada
H. H. Heady
Affiliation:
U. S. Bureau of Mines, Reno, Nevada
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Abstract

An X-ray fluorescence method is presented for the analysis of tungsten-molybdenum solutions. Tungsten and molybdenum metal powders, produced by a fused-salt electrolysis procedure, are dissolved and analyzed for tungsten and molybdenum by using the W La1, Pt La1 intensity ratios. The platinum spectral line from the X-ray tube target serves as a self-internal standard. The sensitivity limit is about 0,05% and in the concentration range of 0.5 to 100%, the accuracy of analysis is within about 2% standard deviation. The technique is also applied to the analysis of tungsten and molybdenum in fused salts and to the determination of several other Impurity elements in these metals.

A double detector modification for the General Electric X-ray unit is described. The detector consists of a double-window flow proportional counter tube backed up by a sealed krypton-filled counter tube. This allows counting of either soft or hard radiation at maximum efficiencies without the necessity of changing counter tubes. Advantages in specific applications are discussed.

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 4: Ninth Annual Conference on Applications of X-ray Analysis, August 10-12, 1960 , 1960 , pp. 474 - 487
Copyright
Copyright © International Centre for Diffraction Data 1960

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