Hostname: page-component-7479d7b7d-wxhwt Total loading time: 0 Render date: 2024-07-12T10:29:47.956Z Has data issue: false hasContentIssue false
  • English
  • Français

Chemical Analysis of Coal by Energy Dispersive X-Ray Fluorescence Utilizing Artificial Standards

Published online by Cambridge University Press:  06 March 2019

Bradner D. Wheeler
Bradner D. Wheeler*
Affiliation:
EG&G ORTEC, Oak Ridge, Tennessee 37830 U.S.A.
Get access

Abstract

Accurate determinations of the elemental composition of coal by classical methods can be quite difficult and are normally very time consuming. X-ray fluorescence utilizing the powder method, however, has the ability of providing accurate and rapid analyses. Unfortunately, well characterized standards, although available, are not plentiful. In addition, the durability or stability of ground and pelletized coal samples is poor resulting in deterioration with time. As a result, artificial coal standards were prepared from certified geological materials by fusing in lithium-tetra-borate in percentages approximating expected ash contents and compositions in coal. Since the lithium-tetra-borate comprises about the same percentage of the standard as does the carbon, hydrogen, and oxygen in coal, the ground and pelletized coal sample can be assayed against the fused calibration curves by compensating for the differences in the mass absorption coefficients of the two matrices.

Type
VIII. XRF General Applications
Information
Advances in X-Ray Analysis , Volume 26: Thirty-First Annual Conference on Applications of X-ray Analysis, August 1-6, 1982 , 1982 , pp. 457 - 466
Copyright
Copyright © International Centre for Diffraction Data 1982

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Alpha Resources, Inc. Stevensville, Michigan 49127.Google Scholar
2. Bramer Standard Company, Inc., Houston, Texas 77069.Google Scholar
3. National Bureau of Standards, Washington, D.C.Google Scholar
4. Bernstein, F., “Particle Size and Mineralogical Effects in Mining Applications”, 11th Annual Conference for Application of X-ray Analysis, Denver Research Institute, University of Denver, 1962.Google Scholar
5. Wheeler, B. D., “Accuracy in X-ray Spectrochemical Analysis as Related to Sample Preparation”, 1979 Symposium on X-ray Fluorescence Analysis in Agrochemistry, TZINO Institute, Moscow, U.S.S.R. September, 1979.Google Scholar
6. Hasler, M. F. and Kemp, J. W. “Suggested Practices for Spectrochemical Compositions”, ASTM E-2 SM2-3, Philadelphia, PA, 1957.Google Scholar
7. American Society for Testing Materials, Committee D-5, Philadelphia, PA, 1982.Google Scholar