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Separation of Heavy Lanthanoids by Flash Column Chromatography for Precise Determination of Er and Yb Isotope Compositions in Rock Samples
Geostandards and Geoanalytical Research ( IF 2.7 ) Pub Date : 2020-03-22 , DOI: 10.1111/ggr.12317 Tetsuya Yokoyama 1 , Ryota Fukai 1, 2 , Masaki Nakahara 1
Geostandards and Geoanalytical Research ( IF 2.7 ) Pub Date : 2020-03-22 , DOI: 10.1111/ggr.12317 Tetsuya Yokoyama 1 , Ryota Fukai 1, 2 , Masaki Nakahara 1
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We present a new column chemistry technique for the quantitative separation of heavy lanthanoids by an ultra‐fine‐grained LN resin (20–50 µm) with a specific emphasis on the purification of Er and Yb for their isotopic analysis. To achieve the quantitative separation of Er and Yb within a reasonable timescale, flash column chromatography was applied, where the column was attached to a newly designed vacuum box system, thus accelerating the elution speed by ten times compared with that of the normal column procedure operated by gravity flow. The recovery yields of Er and Yb were confirmed to be approximately 100%, which is important to suppress the effect of the mass‐independent fractionation of the Er and Yb isotopes during chromatography. Additionally, we have developed precise Er and Yb isotope measurements by thermal ionisation mass spectrometry (TIMS) using multistatic and/or dynamic methods. Moreover, in most cases, the Er and Yb isotope compositions of the measured four terrestrial rock samples were indistinguishable from those of the commercially available Er and Yb Alfa Aesar solutions. The new method presented in this work will be useful for future studies on heavy lanthanoids in various geological materials.
中文翻译：
用快速柱色谱分离重镧系元素以精确测定岩石样品中的Er和Yb同位素组成
我们提出了一种新的柱化学技术，用于通过超细颗粒的LN树脂（20–50 µm）定量分离重镧系元素，特别强调了对Er和Yb进行同位素分析的纯化。为了在合理的时间范围内实现Er和Yb的定量分离，应用了快速柱色谱，该色谱柱连接到新设计的真空箱系统上，因此与常规柱操作相比，洗脱速度提高了十倍通过重力流。证实Er和Yb的回收率约为100％，这对于抑制色谱过程中Er和Yb同位素的质量无关分馏的影响非常重要。另外，我们已经使用多静态和/或动态方法通过热电离质谱（TIMS）开发了精确的Er和Yb同位素测量方法。而且，在大多数情况下，所测量的四个陆地岩石样品的Er和Yb同位素组成与市售Er和Yb Alfa Aesar溶液的同位素组成无法区分。在这项工作中提出的新方法将对未来在各种地质材料中重镧系元素的研究有用。
更新日期：2020-03-22
中文翻译：
用快速柱色谱分离重镧系元素以精确测定岩石样品中的Er和Yb同位素组成
我们提出了一种新的柱化学技术，用于通过超细颗粒的LN树脂（20–50 µm）定量分离重镧系元素，特别强调了对Er和Yb进行同位素分析的纯化。为了在合理的时间范围内实现Er和Yb的定量分离，应用了快速柱色谱，该色谱柱连接到新设计的真空箱系统上，因此与常规柱操作相比，洗脱速度提高了十倍通过重力流。证实Er和Yb的回收率约为100％，这对于抑制色谱过程中Er和Yb同位素的质量无关分馏的影响非常重要。另外，我们已经使用多静态和/或动态方法通过热电离质谱（TIMS）开发了精确的Er和Yb同位素测量方法。而且，在大多数情况下，所测量的四个陆地岩石样品的Er和Yb同位素组成与市售Er和Yb Alfa Aesar溶液的同位素组成无法区分。在这项工作中提出的新方法将对未来在各种地质材料中重镧系元素的研究有用。
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