The Use of Weakly Basic Ion Exchange Resin Amberlite IRA-68 for the Chromatographic Separation of Rare Earth Elements

IF 1.3 4区化学 Q4 BIOCHEMICAL RESEARCH METHODS Chromatographia Pub Date : 2024-12-13 DOI:10.1007/s10337-024-04380-6

Zbigniew Samczyński

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Abstract

The possibility of applying the system: weakly basic Amberlite IRA-68 resin-nitrilotriacetic acid (NTA) solutions for the separation of rare earth elements (REE) by ion exchange chromatography was investigated. Preliminary research results revealed that the affinity of REE towards the ion exchanger is closely correlated with the stability of their negative complexes that they form with NTA. Three separate groups of lanthanides could be distinguished, i.e. light (La, Ce, Pr, Nd), medium (Y, Sm, Eu, Gd, Tb, Dy, Ho, Er) and heavy (Tm, Yb, Lu, Sc). Moreover, it seemed that within the first and third groups it was possible to individually separate elements from each other. Based on the experimentally obtained relationships, the theoretically assumed course of the ion exchange reaction of anionic REE complexes with NTA on the Amberlite IRA-68 resin was confirmed. The influence of the ion exchanger particle size, column size and composition of the mobile phase, i.e. pH, NTA and neutral salt (NaNO₃) concentration, on the chromatographic separation of REE was investigated. It has been shown that the proper selection of these parameters makes it possible not only to divide REE into the three groups mentioned above, but also to individually separate some elements, i.e. La, Ce, Pr, Nd, Tm, Yb, Lu and Sc.

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弱碱性离子交换树脂安培石IRA-68在稀土元素色谱分离中的应用

研究了弱碱性安伯利石IRA-68树脂-硝基三乙酸（NTA）溶液用于离子交换色谱法分离稀土元素的可能性。初步研究结果表明，稀土对离子交换剂的亲和力与其与NTA形成的负络合物的稳定性密切相关。镧系元素可分为轻（La、Ce、Pr、Nd）、中（Y、Sm、Eu、Gd、Tb、Dy、Ho、Er）和重（Tm、Yb、Lu、Sc）三大类。此外，在第一组和第三组中，似乎可以单独地将元素彼此分开。根据实验得到的关系，证实了阴离子REE配合物与NTA在Amberlite IRA-68树脂上离子交换反应的理论假设过程。考察了离子交换剂粒径、柱尺寸、流动相组成pH、NTA和中性盐（NaNO3）浓度对稀土色谱分离的影响。结果表明，适当选择这些参数不仅可以将稀土元素划分为上述三大类，而且可以单独分离出La、Ce、Pr、Nd、Tm、Yb、Lu和Sc等元素。

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来源期刊

Chromatographia 化学-分析化学

CiteScore

3.40

自引率

5.90%

发文量

103

审稿时长

2.2 months

期刊介绍： Separation sciences, in all their various forms such as chromatography, field-flow fractionation, and electrophoresis, provide some of the most powerful techniques in analytical chemistry and are applied within a number of important application areas, including archaeology, biotechnology, clinical, environmental, food, medical, petroleum, pharmaceutical, polymer and biopolymer research. Beyond serving analytical purposes, separation techniques are also used for preparative and process-scale applications. The scope and power of separation sciences is significantly extended by combination with spectroscopic detection methods (e.g., laser-based approaches, nuclear-magnetic resonance, Raman, chemiluminescence) and particularly, mass spectrometry, to create hyphenated techniques. In addition to exciting new developments in chromatography, such as ultra high-pressure systems, multidimensional separations, and high-temperature approaches, there have also been great advances in hybrid methods combining chromatography and electro-based separations, especially on the micro- and nanoscale. Integrated biological procedures (e.g., enzymatic, immunological, receptor-based assays) can also be part of the overall analytical process.