Hostname: page-component-586b7cd67f-rdxmf Total loading time: 0 Render date: 2024-11-23T15:13:19.902Z Has data issue: false hasContentIssue false
  • English
  • Français

The Effects of Operating Variables in the Application of Multielement Calibration Systems for Fluorescent X-Ray Spectrographic Analyses of Mineral Samples

Published online by Cambridge University Press:  06 March 2019

Merlyn L. Salmon
Merlyn L. Salmon*
Affiliation:
FLUO-X-SPEC Laboratory, Denver, Colorado
Get access

Abstract

A highly simplified multielement calibration systemfor semiquantitativeanalyses of mineral samples by fluorescent X-ray spectrography was discussed at the Eighth Annual Conference on Applications of X-ray Analysis. This system relates scattered radiation intensity (background) with peak intensity as measuredon a chart recording to determine concentrations of several elements in a sample.

A continuation of the study reveals the effects of operating variables such as: (1) sample preparation and choice of sample type, (2) operating power and target choice of the X-ray tube, (3) collimation ratio, (4) goniometer scanning rate, (5) choice of method for measurement of background intensity, and (6) control and adjustment of detector, sealer-ratemeter, recorder, and other electronic circuits.

The over-all effects of some operating variables are negligible owing to the compensatory nature of the calibration system. The net effects of others can be directly attributed to particular operating conditions, and these conditions can be controlled to achieve an optimum balance of effects to yield the desired results for accuracy, time required to complete the analyses, and other important requirements in the analyses of minerals.

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 4: Ninth Annual Conference on Applications of X-ray Analysis, August 10-12, 1960 , 1960 , pp. 433 - 456
Copyright
Copyright © International Centre for Diffraction Data 1960

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. Salmon, M. L., “A Highly Simplified Multielement Calibration System for Semiquantitative X-Ray Spectrographic Analysis,” Advances in X-Ray Analysis, Vol. 3, University of Denver, Plenum Press, New York, 1959, p. 139.Google Scholar
2. Birks, L. S., Chemical Analysis (X-Ray Spectrochemical Analysis), Vol. XI, Interscience Publishers, New York, 1959.Google Scholar
3. Liebhafsky, H. A., Pfeiffer, H. B., Winslow, E. H., and Zemany, P. D., X-Ray Absorption and Emission in Analytical Chemistry, John Wiley and Sons, New York, 1960.Google Scholar
4. Heinrich, K. F. J., “Variables Which Must Be Considered in Practical X-Ray Spectroscopy,” 11th Annual Symposium on Spectroscopy. Chicago, Illinois, June, 1960.Google Scholar
5. Myers, A. T. and Wood, W. H., “Ceramic Mills in a Paint Mixer for Preparation of Multiple Rock Samples,” Applied Spectroscopy, Vol. 14, No. 5, 1960, p. 136.Google Scholar
6. Powers, M. C., X-Ray Fluorescent Spectrometer Conversion Tables, Philips Electronics, Mount Vernon, New York, 1957.Google Scholar
7. Fankuchen, I., private communication, March, 1955.Google Scholar
8. Salmon, M. L. and Blackledge, J. P., Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy, Pittsburgh, Pennsylvania, March, 1956.Google Scholar
9. Salmon, M. L., “Recent Developments in Fluorescent X-Ray Spectrographic-Absorptiometric Analyses of Mineral Systems,” Advances in X-Ray Analysis, Vol. 2, University of Denver, Plenum Press, New York, 1960, p. 303.Google Scholar
10. Salmon, M. L., “The Use of Weighed, Thin-Section Samples in a Study of Chemical State and Matrix Effects in Fluorescent X-Ray Spectrography,” 11th Annual Symposium on Spectroscopy, Chicago, Illinois, June, 1960.Google Scholar