Journal of Radioanalytical Chemistry

, Volume 6, Issue 1, pp 97–113 | Cite as

Analysis for the rare-earth elements by neutron activation and Ge(Li) spectrometry

  • E. B. Denechaud
  • P. A. Helmke
  • L. A. Haskin


A procedure for analysis of 12 of the rare-earths, tested on more than a hundred samples of rocks and minerals, is described. Carrier is added for each element to be determined. Samples are fused with Na2O2. The rare-earths are separated as a group, then precipitated and mounted as oxalates for Ge(Li) spectrometry. Following radioassay, chemical yields for the individual rare-earths are obtained by irradiation and counting of the carrier. About two months are needed to obtain complete data for a set of four samples, but many samples are analyzed concurrently. The precision and accuracy exceed ±5 per cent for 10 of the elements in 0.1 to 0.5 g samples of common rocks.


Statistical Uncertainty Chemical Yield Isopropyl Ether Standard Monitor Peak Channel 
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Copyright information

© Akadémiai Kiadó 1970

Authors and Affiliations

  • E. B. Denechaud
    • 1
  • P. A. Helmke
    • 1
  • L. A. Haskin
    • 1
  1. 1.Department of ChemistryUniversity of WisconsinMadisonUSA

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