R7：岩石・鉱物・鉱床 (資源地質 学会 との共催 セッション)

[R7-03] High purity elemental separation technique for LREEs from silicate matrix

*Bidisha Dey¹, Tomoyuki Shibata¹, Masako Yoshikawa¹ (1. Hiroshima Uni. Sci.)

キーワード：REE geochemistry, Nd isotope geochemistry

We have developed an improved method for LREE separation from silicate matrix, for isotopic measurement in TIMS or MC-ICP-MS. We have used dilute HNO₃ and NaBrO₃ to separate the LREEs from each other. This method has advantage of being faster and more efficient in separating LREEs over the previous methods and, unlike other methods, does not use conc. HNO₃ which is difficult to handle. Results show >90% recovery yield for all target elements and accurate and reproducible ¹⁴³Nd/¹⁴⁴Nd ratios for JB-2 in TIMS.