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Electron Microprobe Reference Materials for Geologic Analysis a Need for Developing Strategy

Published online by Cambridge University Press:  02 July 2020

Eugene Jarosewich
Eugene Jarosewich*
Affiliation:
Department of Mineral Sciences National Museum of Natural History Smith sonian Institution, Washington, D.C., 20560
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Extract

Each field of electron microprobe analysis has its own specific analytical difficulties. Problems relating to the analysis of geologic materials can be primarily attributed to the fact that the samples are nonconductive, some are unstable under the beam, and they have a complex matrix. There are various techniques to solve these analytical problems, but the selection of appropriate standards is one of most important factors.

In study of geologic materials a convention prevails that the summation approximates 100%. For most analyses summation is an indication of the quality of analysis, although some elements could be over or under corrected. Significant progress has been made in developing correction procedures, yet some fundamental parameters still are not well known, and the results will vary depending on which procedures or fundamental parameters are used. One of the most practical solutions to eliminate significant matrix effects is to select reference materials with a close composition to the unknown.

Type
Quantitative Microanalysis
Information
Microscopy and Microanalysis , Volume 4 , Issue S2: Proceedings: Microscopy & Microanalysis '98, Microscopy Society of America 56th Annual Meeting, Microbeam Analysis Society 32nd Annual Meeting, Atlanta, Georgia July 12-16, 1998 , July 1998 , pp. 238 - 239
Copyright
Copyright © Microscopy Society of America

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References

1. Jarosewich, E., Nelen, J. A. and Norberg, J. A. (1980) Reference Samples for Electron Microprobe Analysis. Geostandards Newsletter 4, 43–47.CrossRefGoogle Scholar

2. Jarosewich, E., Boatner, L. A. (1993) Rare-Earth Element Reference Samples for Electron Microprobe Analysis. Geostandards Newsletter 15, 397–399.CrossRefGoogle Scholar

3. Kane, J. (1997) Geoanalysis'97, The Third International Conference on the Analysis of Geological and Environmental Materials, The Analyst 122 (11), 1177.Google Scholar