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A Comprehensive Alpha Coefficient Algorithm

Published online by Cambridge University Press:  06 March 2019

G.R. Lachance  and
F. Claisse
G.R. Lachance
Affiliation:
Geological Survey of Canada, Ottawa, Ont. and Dept. Mining and Metallurgy, Université Laval, Québec, Qué. Canada
F. Claisse
Affiliation:
Geological Survey of Canada, Ottawa, Ont. and Dept. Mining and Metallurgy, Université Laval, Québec, Qué. Canada
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Abstract

An algorithm is proposed as a model that describes the intensity concentration relation over a wide concentration range in binary and more complex systems involving absorption and enhancement. All the influence coefficients can be determined from fundamental parameter equations. Terms containing product of two weight fractions are always negligible in pure absorption cases, are often negligible in absorption/weak enhancement cases and are necessary but small in strong absorption/strong enhancement situations.

Once the magnitude of the coefficients is known, the range of application of the one- or two-coefficient models can be established with certitude.

Type
Mathematical Methods in XRF
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. 87 - 92
Copyright
Copyright © International Centre for Diffraction Data 1979

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References

1. Lachance, G.R. and Traill, R.J., “A Practical Solution to the Matrix Problem in X-Ray Analysis”, Can. Spectry, 11: 43-48 (1966).Google Scholar
2. claisse, P. and Quintin, M., “Generalisation of the Lachance-Traill Method for the Correction of the Matrix Effect in X-Ray Fluorescence Analysis”, Can. Spectry 12: 129–134 (1967).Google Scholar
3. Tertian, R., “An Accurate Coefficient Method for X-Ray Fluorescence Analysis”, in “Advances in X-Ray Analysis”: 85–109 (1976).Google Scholar
4. Lachance, G.R., “Fundamental Coefficients for X-Ray Spectrochemical Analysis”, Can. Spectry 15: 64-71 (1970).Google Scholar