Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, Milwaukee, WI, 53211, USA.
Department of Chemistry and Biochemistry, University of Wisconsin-Milwaukee, Milwaukee, WI, 53211, USA.
Talanta. 2021 Jan 15;222:121541. doi: 10.1016/j.talanta.2020.121541. Epub 2020 Aug 15.
Changes in the level of impregnation of an Amberchrom CG-71m support with bis(2-ethylhexyl)phosphoric acid (HDEHP) are shown to alter the column efficiency, peak tailing, and metal ion uptake capacity associated with the resulting extraction chromatographic resins. Optimum efficiency and minimum peak tailing are observed at intermediate levels (ca. 20% (w/w)) of support loading. Metal ion uptake capacity is reduced relative to a commercial (loaded to 40% (w/w)) resin under the same conditions, however. The utility of the improved efficiency arising from reduced support loading is illustrated in the separation of selected trivalent lanthanide ions, including Gd(III) and Eu(III), whose resolution is unsatisfactory using commercial extraction chromatographic materials.
用双（2-乙基己基）磷酸（HDEHP）对 Amberchrom CG-71m 载体的浸渍水平的变化表明，这会改变与所得萃取色谱树脂相关的柱效率、峰拖尾和金属离子吸收能力。在中间水平（约 20%（w/w））的载体负载下观察到最佳效率和最小的峰拖尾。然而，在相同条件下，与商业（负载至 40%（w/w））树脂相比，金属离子吸收能力降低。通过减少载体负载而提高的效率的实用性在分离选定的三价镧系离子，包括 Gd（III）和 Eu（III）中得到了说明，使用商业萃取色谱材料，其分辨率不理想。
