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本文在前文的基础上着重研究了CL-5709萃淋树脂分离钕和铒的最佳条件。研完了溶液的酸度,洗脱液的流速,分配比(D)以及分离因素(βEr/Nd)对Nd~(3+)和Er~(3+)萃取色层分离的影响。吸附在树脂上的稀土元素可被Imol盐酸溶液定量洗脱而与共存的碱土金属及贱金属分离。柱上分离Nd~(3+)和Er~(3+)离子(各40μg)仅用了21min即达到定量分离。用该树脂富集分离水及铸铁试样中的微量稀土,取得了满意的结果。另外,还测定了树脂的使用寿命。
Based on the above, this article focuses on the CL-5709 extraction resin best separation of neodymium and erbium. The effects of the acidity of the solution, the flow rate of the eluent, the partition ratio (D) and the separation factor (βEr / Nd) on the chromatographic separation of Nd 3+ and Er 3+ were studied. Rare earth elements adsorbed on the resin can be quantitatively eluted with an Imol hydrochloric acid solution to separate from the coexisting alkali earth metals and base metals. Quantitative separation of Nd ~ (3+) and Er ~ (3+) ions (40 μg each) was achieved in 21 min. The resin was used to enrich trace rare earths in water and cast iron samples, and satisfactory results were obtained. In addition, the service life of the resin was also measured.