通过保留离子策略的萃取色谱法分离铷同位素
Separation of rubidium isotopes by extraction chromatography with a retaining ion strategy.
摘要(中文译文)
目前，铷同位素的分离主要依赖电磁法。然而，操作复杂性和高昂的设备成本严重限制了其更广泛的适用性和工业可扩展性。在本研究中，我们提出了一种新型萃取色谱法用于铷同位素分离，该方法以浸渍t-BAMBP的树脂作为固定相，并引入K作为保留离子以提高洗脱过程中Rb与Rb之间的分离系数。与传统电磁分离相比，这种新型萃取色谱法在铷同位素分离方面具有操作条件简单和处理成本较低的优点。根据斯托克斯-爱因斯坦关系，质量较轻的Rb具有较小的有效流体力学半径，因此与Rb相比具有更高的扩散系数。这种内在的动力学差异，结合它们在浸渍t-BAMBP树脂上分配比的微小差异，导致色谱洗脱过程中Rb的迁移速率快于Rb。引入K作为保留离子进一步延长了保留时间并增加了吸附-解吸循环的塔板数，从而放大了Rb的纵向扩散优势。在优化条件下，引入K作为保留离子所产生的协同效应使单柱分离因子最高达到1.00534。当前工作实现了铷同位素分离的突破，有利于未来的工业应用。
Abstract
Currently, separation of rubidium isotopes relies predominantly on electromagnetic methods. However, operational complexity and prohibitive equipment costs severely limit its broader applicability and industrial scalability. In this study, we propose a novel extraction chromatography method for rubidium isotope separation of using t-BAMBP-impregnated resin as the stationary phase and introducing K as retaining ion to increase the separation coefficient between Rb and Rb during elution process. Compared to conventional electromagnetic separation, this new extraction chromatography method features a simple operating condition and lower processing cost for rubidium isotope separation. According to the Stokes-Einstein relation, the lighter mass of Rb has a smaller effective hydrodynamic radius and consequently a higher diffusion coefficient compared to Rb. This intrinsic kinetic difference, combined with the subtle disparity in their distribution ratios on the t-BAMBP-impregnated resin, leads to a faster migration rate of Rb over Rb during chromatographic elution. The introduction of K as a retaining ion further prolongs the retention time and increases the plate number of adsorption-desorption cycles, thereby amplifying the longitudinal diffusion advantage of Rb. Under the optimized conditions, this synergistic effect from introduction of K as a retaining ion yields a maximum single-column separation factor of 1.00534. The current work achieves a breakthrough in rubidium isotope separation, which is beneficial for future industrial applications.
如何引用
AMA
Yan Jiang, Haozhe Li, Jun Cheng, Ziliang Tang, Kun Huang. Separation of rubidium isotopes by extraction chromatography with a retaining ion strategy.. Journal of chromatography. A. 2026; doi:10.1016/j.chroma.2026.467039.
APA
Yan Jiang, Haozhe Li, Jun Cheng, Ziliang Tang, Kun Huang (2026). Separation of rubidium isotopes by extraction chromatography with a retaining ion strategy.. Journal of chromatography. A. https://doi.org/10.1016/j.chroma.2026.467039
GB/T 7714
Yan Jiang, Haozhe Li, Jun Cheng, Ziliang Tang, Kun Huang. Separation of rubidium isotopes by extraction chromatography with a retaining ion strategy.[J]. Journal of chromatography. A, 2026 doi:10.1016/j.chroma.2026.467039.
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