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X-Ray Fluorescence Analysis of Portland Cement Through the Use of Experimentally Determined Correction Factors

  • C. H. Anderson (a1), J. E. Mander (a2) and J. W. Leitner (a1)

Abstract

Correction factors, termed α-factors, similar to those defined by LaChance and Traill have been generated by the addition of variable, known amounts of individual oxides, or other compounds, to a base cement sample and measuring the x-ray intensities of the elements of interest. The effects of all common constituents of cement on the determination of CaO, SiO2 and Al2O3 were found. Factors for rhodium and chromium primary radiation were determined and, in general, showed small but significant differences. The factors for rhodium at 50kV and 30kV were substantia11y identical. The correction factors were tested through the use of the NBS 1011- 1016 cements as reference standards to analyze the new proposed NBS cement series. The correction factors not only furnished improved calibration curves, but also allowed the determination of CaO, Al2O3 and SiO2 with an average deviation of less than 0.2% (absolute) from the provisional values furnished with the standard samples.

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1. Criss, J. W. and Birks, L. S., “ Calculation Methods for Fluorescent X-Ray Spectrotnetry,” Analytical Chemistry, 40, 10801086 (1968).
2. Lucas-Tooth, J. and Pyne, C., “The Accurate Determination of Major Constituents by X-Ray Fluorescence Analysis in the Presence of Large Interelement Effects,” Advances in X-Ray Analysis, Vol. 7, Plenum press New York, 526554 (1964).
3. LaChance, G. R. and Traill, R. J., “A Practical Solution to the Matrix Problem in X-Ray Analysis”, Canadian Spectroscopy, 11, 4348 (1966).
4. Jenkins, R and Campbell-Whitelaw, A., “Determination of Interelement Correction Factors for Matrix Correction Procedures in X-Ray Fluorescence Spectrometry,Canadian Spectroscopy, 15, 3238 (1970).
5. Albee, A. L. and Lily Ray, “Correction Factors for Electron Probe Microanalysis of Silicates, Oxides, Carbonates, Phosphates and Sulfates,Analytical Chemistry, 42, 14081414 (1970).

X-Ray Fluorescence Analysis of Portland Cement Through the Use of Experimentally Determined Correction Factors

  • C. H. Anderson (a1), J. E. Mander (a2) and J. W. Leitner (a1)

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