Journal of Radioanalytical and Nuclear Chemistry

, Volume 102, Issue 1, pp 227–238 | Cite as

INAA determination of holmium in submilligram samples of cosmochemical and geochemical interest and the second-order activation interference

  • I. Kawabe
  • T. Tanaka
  • V. Ekambaram
  • A. M. Davis
  • L. Grossman
Article
Received:

Abstract

Second-order neutron activation becomes a serious interference in NAA determinations of REE in submilligram samples of meteoritic and terrestrial materials when neutron fluences reach levels of 1020 n·cm−2 or more. The Dy-interference to Ho determination and the Eu-interference to Gd determination are quite, large. We discuss the importance of second-order activation interferences in REE determinations, and present an experimental method to correct the Dy-interference to Ho determination by INAA. Ho concentrations in splits of less than 0.2 mg of BCR-1 and SP can be accurately determined by INAA with a neutron fluence of 2·1020 n·cm−2 in spite of large Dy interferences of up to 200%. It is necessary for NAA determinations of REE with high neutron fluences that each REE standard be separated from its neighboring REE, in order to correct the second-order activation interferences experimentally.

Keywords

Physical Chemistry Inorganic Chemistry Experimental Method Neutron Activation INAA 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Akadémiai Kiadó 1986

Authors and Affiliations

  • I. Kawabe
    • 1
  • T. Tanaka
    • 1
  • V. Ekambaram
    • 1
  • A. M. Davis
    • 1
  • L. Grossman
    • 1
  1. 1.Department of the Geophysical SciencesUniversity of ChicagoChicagoUSA

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