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Spectrographic determination of trace rare earth elements in high purity thorium

Spektrographische Bestimmung von Spuren Seltener Erden in hochreinem Thorium

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Zusammenfassung

15 Seltene Erdelemente konnten in Thorium bestimmt werden. Zur Anwendung kam ein Gleichstrombogen niederer Stromstärke. Als innerer Standard diente Scandium. Zur Anreicherung der Seltenen Erden wurde ein Kationenaustauscher verwendet. Mit 1 g-Proben konnten hohe Empfindlichkeiten erzielt werden. Die Nachweisgrenzen liegen im Bereich von 0,01 μg (Yb) bis 0,5 μg (Pr, Nd).

Summary

An emission spectrographic determination of fifteen rare earth elements in thorium was developed, the spectrographic procedure was carried out using low current d.c. arc and using Sc as an internal standard. The rare earth impurities were concentrated with cation-exchange resin. Very high sensitivity was achieved with 1 g sample. The detection limits range from 0.01 μg for Yb to 0.5 μg for Pr and Nd.

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References

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Authors and Affiliations

  1. Department of Chemistry, National Tsing Hua University, Hsinchu

    C. C. Chang, J. S. Shih & C. T. Chang

  2. Institute of Nuclear Energy Research, Lungtan, Taiwan, China

    C. C. Chang, J. S. Shih & C. T. Chang

Authors
  1. C. C. Chang
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  2. J. S. Shih
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  3. C. T. Chang
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Chang, C.C., Shih, J.S. & Chang, C.T. Spectrographic determination of trace rare earth elements in high purity thorium. Z. Anal. Chem. 270, 187–190 (1974). https://doi.org/10.1007/BF00445953

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  • DOI: https://doi.org/10.1007/BF00445953

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