Characterization of a Set of Improved, CMPO-Based, Extraction Chromatographic Resins: Applications to the Separation of Elements Important for Geochemical and Environmental Studies

IF 1.8 4区 化学 Q3 CHEMISTRY, MULTIDISCIPLINARY
C. Pin, Jean-Luc Piro
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引用次数: 0

Abstract

ABSTRACT This article describes several extraction chromatographic materials aiming to offer improved potential for isolating trace elements with high charge/ionic radius ratio from accompanying matrix elements in natural samples. Starting with commercially available, field-proven, TRU- and RE-Spec materials (Eichrom Technologies), three resins containing less TBP in the CMPO-TBP mixtures, or even neat CMPO only, have been prepared and characterized through measurement of the distribution ratios of some fifty elements in HNO3 and HCl media of variable strength. These resins were further evaluated for analytical applications on geochemical samples. The results highlight a strong enhancement of weight distribution ratios of many elements of interest in geochemistry, cosmochemistry, and environmental sciences (Lanthanides, naturally occurring Actinides, High Field Strength Elements). Combined with good chromatographic characteristics, these high Dw’s make it possible to achieve excellent group separations by using very small columns operated at relatively high, gravity-driven flow rate. Moreover, in an attempt to further improve the selectivity against Fe(III) and Ti(IV), preliminary investigations were made on an additional pair of resin prototypes impregnated with a CMPO-substituted calixarene. Although promising distribution ratio data were obtained, these prototypes did not permit to prepare columns with satisfactory chromatographic characteristics, and this approach still waits for a better impregnation methodof the porous inert support.
一组改进的、基于cmpo的萃取色谱树脂的表征:在地球化学和环境研究中重要元素分离中的应用
摘要:本文介绍了几种萃取色谱材料,旨在提高从天然样品中伴随的基质元素中分离具有高电荷/离子半径比的微量元素的潜力。从商业化的、经过现场验证的TRU-和RE-Spec材料(Eichrom Technologies)开始,制备了三种树脂,其中CMPO-TBP混合物中含有较少的TBP,甚至只有纯CMPO,并通过测量约50种元素在变强度HNO3和HCl介质中的分布比例来表征。进一步评价了这些树脂在地球化学样品分析中的应用。结果突出了地球化学、宇宙化学和环境科学中许多感兴趣的元素(镧系元素、自然存在的锕系元素、高场强元素)的重量分布比的强烈增强。结合良好的色谱特性,这些高Dw可以通过使用非常小的柱在相对高的重力驱动流速下操作来实现出色的组分离。此外,为了进一步提高对Fe(III)和Ti(IV)的选择性,我们对另外一对浸渍cpo -取代杯芳烃的树脂原型进行了初步研究。虽然获得了有希望的分布比数据,但这些原型还不允许制备具有令人满意的色谱特性的柱,该方法仍有待于更好的多孔惰性载体浸渍方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
4.40
自引率
5.00%
发文量
15
审稿时长
8.4 months
期刊介绍: Solvent Extraction and Ion Exchange is an international journal that publishes original research papers, reviews, and notes that address all aspects of solvent extraction, ion exchange, and closely related methods involving, for example, liquid membranes, extraction chromatography, supercritical fluids, ionic liquids, microfluidics, and adsorption. We welcome submissions that look at: The underlying principles in solvent extraction and ion exchange; Solvent extraction and ion exchange process development; New materials or reagents, their syntheses and properties; Computational methods of molecular design and simulation; Advances in equipment, fluid dynamics, and engineering; Interfacial phenomena, kinetics, and coalescence; Spectroscopic and diffraction analysis of structure and dynamics; Host-guest chemistry, ion receptors, and molecular recognition.
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