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Simultaneous X-Ray Emission Analysis of P, Si, Ca, Fe, Al, and Mg in Phosphate Rock Using a Small Computer to Correct for Matrix Variations

Published online by Cambridge University Press:  06 March 2019

Charles N. McKinney  and
Arthur S. Rosenberg
Charles N. McKinney
Affiliation:
Continental Oil Company Ponca City, Oklahoma 74601
Arthur S. Rosenberg
Affiliation:
Continental Oil Company Ponca City, Oklahoma 74601
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Abstract

Phosphate rock from different sources varies widely in composition. This results in a large interelement effect. A mathematical model was developed to correct for matrix variations in each sample. This model utilizes the X-ray intensity from each of the six elements considered and the mass absorption coefficients of the elements to calculate concentrations. Accurate analyses for P, Si, Ca, Fe, Al, and Mg are obtained using this model. The X-ray instrument is interfaced with a small computer that performs the calculations on each sample and prints the results.

Sample preparation, standardization and the computer programs used for sample calculation and standardization will be discussed.

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 13: Eighteenth Annual Conference on Applications of X-ray Analysis, August 6-8, 1969 , 1969 , pp. 125 - 135
Copyright
Copyright © International Centre for Diffraction Data 1969

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References

1. Heinrich, K. F. J., “X-ray Absorption Uncertainty” in McKinley, E. D., Heinrich, K. F. J., and Wittry, D. B. (eds.), The Electron Microprobe, John Wiley and Sons, New York, 1966, pp. 296–377.Google Scholar
2. Mitchell, B. J. and Hopper, F. N., “Digital Computer Calculation and Correction of Matrix Effects in X-ray Spectroscopy,” Appl. Spectry, 20: 172, 1966.Google Scholar
3. Mitchell, B. J., “Applications of Computerized Statistical Techniques in Quantitative X-Ray Analysis,” in: Newkirk, J. B., Mallett, G. R. and Pfeiffer, H. G. (eds.), Advances in X-ray Analysis, Vol. II, Plenum Press, New York, 1968; pp. 129–149.Google Scholar