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New Mold Design for Casting Fused Samples

Published online by Cambridge University Press:  06 March 2019

Joseph E. Taggart Jr.  and
James S. Wahlherg
Joseph E. Taggart Jr.
Affiliation:
U.S. Geological Survey, Box 25046, MS 928, Denver, Colorado 80225
James S. Wahlherg
Affiliation:
U.S. Geological Survey, Box 25046, MS 928, Denver, Colorado 80225
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Extract

Geological samples prepared for analysis by X-ray fluorescence (XRF) are particularly prone to intrasample and intersample phase variations creating significant inhomogeneity and variations in matrix effects. These features may “best be eliminated or diminished by fusion of the sample with, a suitable flux (1,2). Presentation to the X-ray spectrometer may be as a briquet of the comminuted fusion head (1,3,4,5) or as a molded glass disc or wafer (l,2,5,6). Because of the stability of glass discs and the necessity to eliminate possible contamination during grinding and making briquets, molded glass discs appear to be the best and easiest means of presentation.

Type
XRF: Techniques and Instrumentation
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. 257 - 261
Copyright
Copyright © International Centre for Diffraction Data 1979

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References

1. Bertin, E. P., Principles and Practice of X-ray-Spectrometric Analysis, Plenum Press, New York, 2nd ed., p. 109 (1975).Google Scholar
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