GEOCHEMICAL JOURNAL
Online ISSN : 1880-5973
Print ISSN : 0016-7002
ISSN-L : 0016-7002
Chemical separation and determination of the isotopic compositions of dysprosium, erbium and ytterbium in geochemical materials by thermal ionization mass spectrometry
Yuki MizutaniHiroshi HidakaShigekazu Yoneda
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2020 Volume 54 Issue 6 Pages 381-391

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Abstract

An experimental method was developed for mutual separation of a series of rare earth elements (REE) from 57La to 71Lu. This method was applied in isotopic analyses of geological materials. Resin chemistry was used in a two-step chemical separation procedure. The first step is the separation of a fraction including a group of REE from the major component elements in common silicate rocks using a cation-exchange resin. The second successive step is the mutual separation of the individual REE using a lanthanoid element-specific resin (Ln resin). To confirm the validity of our chemical separation techniques for isotopic studies of geochemical applications, isotopic analyses of Dy, Er, and Yb separated from two geological materials, JB-2 and JG-2, were performed by thermal ionization mass spectrometry (TIMS). Our analytical techniques provide high-quality isotopic data within 0.004% of analytical reproducibility (95% confidence level) for major isotopic ratios of Dy, Er and Yb in geological samples.

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© 2020 by The Geochemical Society of Japan
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