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微量稀土的分离富集,目前应用得较多的是离子交换树脂法,此法优于沉淀法,分离简便,富集完全,但柱上的分离时间较长,一般在20小时左右。新近应用于岩石中稀土富集的萃取色谱法,流速高于离子交换色谱法,洗提峰陡而对称,无拖尾,洗提体积小于离子交换色谱法。我们在工作的基础上,运用P507萃取树脂分离富集岩石中的微量稀土取得了成功。柱上的分离时间约2小时,洗脱液的体积仅25
The separation and enrichment of trace rare earth, currently used more ion exchange resin method, this method is superior to the precipitation method, the separation is simple and complete enrichment, but the column separation time is longer, usually about 20 hours. Recently, it has been applied to the extraction of rare earth in rock by extraction chromatography. The flow rate is higher than that of ion exchange chromatography. The elution peak is steep and symmetrical, without tailing. The volume of elution is smaller than ion exchange chromatography. Based on our work, we succeeded in using P507 extraction resin to separate and enrich trace rare earths in rocks. The separation time on the column is about 2 hours and the volume of eluate is only 25