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Effects of pre-irradiation treatments in neutron activation analysis of rocks for measurements of their lanthanoid, thorium and uranium contents

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Abstract

Determination of the lanthanoids, thorium and uranium in silicate rocks has been investigated by neutron activation analysis (NAA). Seven or eight lanthanoids and thorium and uranium were determined by non-destructive instrumental NAA. The numbers of the lanthanoids determined were increased and errors on the final values were reduced by pre-irradiation treatments, which included a coprecipitation process with aluminium as collector to remove the alkali metals and halogens and a solvent extraction process to eliminate iron. The necessity of scandium removal was indicated.

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Authors and Affiliations

  1. Department of Chemistry, Sophia University, 7-1 Kioicho, Chiyodaku, 102, Tokyo, Japan

    T. Oi, Y. Kikawada & H. Kakihana

  2. Atomic Energy Research Laboratory, Musashi Institute of Technology, 971 Ozenji, Asaoku, 215, Kawasakishi, Kanagawa, Japan

    T. Honda & T. Ossaka

Authors
  1. T. Oi
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  2. Y. Kikawada
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  3. T. Honda
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  4. T. Ossaka
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  5. H. Kakihana
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Oi, T., Kikawada, Y., Honda, T. et al. Effects of pre-irradiation treatments in neutron activation analysis of rocks for measurements of their lanthanoid, thorium and uranium contents. Journal of Radioanalytical and Nuclear Chemistry, Articles 150, 103–116 (1991). https://doi.org/10.1007/BF02041494

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  • DOI: https://doi.org/10.1007/BF02041494

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