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Energy Dispersive XRF Analysis of Lubricating Oil Additives with Secondary Target Excitation and the EXACT Fundamental Parameters Program

Published online by Cambridge University Press:  06 March 2019

Kenneth C. Stehr
Kenneth C. Stehr*
Affiliation:
Applications Laboratory, KEVEX Corporation Foster City, CA 94404
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Extract

The need for rapid and accurate analysis of lubricating oil additives is firmly established by the petroleum industry. The application of energy dispersive X-ray fluorescence spectrometry techniques to this analysis is a valuable aid in achieving reliable and fast quality control of these product types.

Due to the large concentration variations possible for the elements of interest within these materials (principally Zn, Ca, P, S at 0-20%), interelement effects can become significant. In order to correct for interelement effects, historical XRF methods have relied on a large number of standards for each element to be determined or matrix matching with standards closely bracketing the unknown sample concentrations.

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. 173 - 176
Copyright
Copyright © International Centre for Diffraction Data 1981

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References

1. Otvos, J. W., Wyld, G. E. A., and Yao, T.C., “Fundamental Parameter Method for Quantitative Elemental Analysis With Monochromatic X-ray Sources,” paper presented at 25th Annual Denver X-ray Conference (1976).Google Scholar
2. Harmon, J.C., Wyld, G. E. A., Yao, T.C., and Otvos, J.W., “X-ray Fluorescence Analysis of Stainless Steels and Low Alloy Steels Using Secondary Targets and the EXACT Program,” paper presented at 26th Annual Denver X-ray Conference (1977).Google Scholar