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Count Distribution and Precision in X-Ray Fluorescence Analysis

Published online by Cambridge University Press:  06 March 2019

Kurt F.J. Heinrich
Kurt F.J. Heinrich*
Affiliation:
E.I. du Pont de Nemours and Company, Wilmington, Delaware
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Abstract

The statistical fluctuations of photon counts arediscussedas a factor limiting the precision of the analytical result. Assuming a Poisson distribution, the theoretical standard deviation of the result can be calculated. While this prediction does not consider causes of variation other than the count statistics, it is useful in developing methods and checking instrument reliability. Practical examples using experimental results are given.

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 3: Eighth Annual Conference on Applications of X-ray Analysis, August 12-14, 1959 , 1959 , pp. 95 - 107
Copyright
Copyright © International Centre for Diffraction Data 1959

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References

1 Brissey, R. M., Liebhafsky, H. A., and Pfeiffer, H. G., ASTM Special Technical Publication, No. 157, 1954, p. 50.Google Scholar
2 Heinrich, K. F. J. and McKinley, T. D., Paper presented at the Pittsburgh Conference on Analytical Chemistry, March, 1959.Google Scholar
3 Parrish, N., Philips Technical Review, Vol.17, No. 7-8, Jan., 1956, p. 206.Google Scholar
4 Davies, O. L., Statistical Methods in Research and Production, Chapter 4; Hafner Publishing Co., New York, 1957.Google Scholar