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"Standard-Background" Method of X-Ray Spectral Analysis for Quality Control of Noble Metals in Alumina-Based Automobile Exhaust Catalysts

Published online by Cambridge University Press:  06 March 2019

Yury M. Gurvich
Yury M. Gurvich*
Affiliation:
Applied Research Laboratories 9545 Wentworth Street Sunland, California 91040
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Extract

Development of matrix correction procedures in the field of X-ray spectral analysis leads usually to “universal” algorithms which allow use of a common calibration equation for assay of various materials with different composition and concentration ranges. In many applications, such methods can guarantee accuracy of 3-5% rel.

For X-ray analysis of automotive catalysts, one such technique is based on the theoretical correction of interelement effects. The article states that “the overall accuracy of this approach is about 10% relative error, although this may vary depending upon the particular specimen being analyzed.” However, narrow specification limits for the quality control of catalysts require the total error of analysis less than 1-1.5% rel.

Type
IV. XRF Applications : Metals, Catalysts, Oils
Information
Advances in X-Ray Analysis , Volume 25: Thirtieth Annual Conference on Applications of X-ray Analysis, August 3-7, 1981 , 1981 , pp. 145 - 149
Copyright
Copyright © International Centre for Diffraction Data 1981

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References

1. Artz, B.E., X-Ray Spectrometry, vol. 6, no. 3, 165–170 (1977).Google Scholar
2. Andermann, G., Kemp, J.W., Analytical Chemistry, vol. 30, 1306–1958 (1958).Google Scholar
3. Kallman, S., Talanta, vol. 23, S-79–583 (1976).Google Scholar