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Microprobe Analysis of Soil Erosion Aerosols

Published online by Cambridge University Press:  06 March 2019

Sonia N. Gitlin
Sonia N. Gitlin*
Affiliation:
National Center for Atmospheric Research, *Boulder, Colorado 80303
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Abstract

Pure standards of molybdenum disulfide, silver, and calcium silicide particles 0.5 μm in diameter and larger, were used to obtain calibration curves for size effect on x-ray intensities. The decrease in intensity with size follows a straight line down to about 3 μm. For the smaller sizes the intensities decrease exponentially. Good agreement has been found between curves calculated using simplified models of diffusion volumes intercepted by the particles and curves of measured x-ray intensities.

The intensity versus size was plotted as a percentage of the intensity of a flat, infinite standard. Therefore, the number of counts measured for a sample of known size can be converted to the intensity it would have if it were an infinite surface. These values can then be plugged into existing computer programs for quantitative analysis. Samples of atmospheric aerosols were analyzed by using these calibration curves.

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 18: Twenty-Third Annual Conference on Applications of X-ray Analysis, August 7-9, 1974 , 1974 , pp. 606 - 618
Copyright
Copyright © International Centre for Diffraction Data 1974

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References

1. Gillette, D. A., “On the Production of Soil Wind Erosion Aerosols Having the Potential for Long Range Transport,” submitted to J. Recherches Atmospheriques.Google Scholar
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