Separation of rare earth elements from scandium by extraction chromatography: Application to radiochemical neutron activation analysis for trace rare earth elements in geological samples

H. Minowa, M. Ebihara*

*この研究の対応する著者

研究成果: Article査読

40 被引用数 (Scopus)

抄録

An effective and practical radiochemical separation procedure of radiochemical neutron activation analysis (RNAA) for ultra trace rare earth elements (REEs) in silicate rock samples is presented. The procedure consists of two column separations of anion exchange and extraction chromatography and precipitations as hydroxide and fluoride of REEs. The most seriously interfering nuclide, 46Sc, is completely separated (<0.005%) from REEs by extraction chromatography using transuranic-element specific (TRU.Spec) resin. Chemical yields were determined by inductively coupled plasma atomic emission spectrometry (ICP-AES) and found to be constant within 3% for all REEs, implying that no fractionation occurs among REEs during the radiochemical purification procedure. By means of this procedure, other interfering nuclides than 46Sc in RNAA of silicate samples were decreased down to <0.02% for 59Fe, <0.006% for 60Co and <0.000005% for 51Cr. The RNAA procedure described in this paper can be one of the most suitable analytical procedures for accurately determining ultra-trace (1-10pg) REEs in geological and cosmochemical samples.

本文言語English
ページ(範囲)25-37
ページ数13
ジャーナルAnalytica Chimica Acta
498
1-2
DOI
出版ステータスPublished - 2003 11月 28
外部発表はい

ASJC Scopus subject areas

  • 分析化学
  • 生化学
  • 環境化学
  • 分光学

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