【摘要】 <正> 在萃取色谱法中,将萃取剂负载在担体上有两种方法:一是将萃取剂与某一种易挥发的稀释剂混和后,浸渍于惰性担体上;二是将萃取剂与聚合物的单体混在一起,在聚合物固化成形后萃取剂即充填在聚合物的网格中。第一种方法不需要专门设备,使用者较易掌握,但担体如硅球、硅藻土等需经硅烷化处理,手续繁更多还原

【Abstract】 Detailed investigation has been made on the physical properties and rare earth separation behavior of P507（2-ethylhexyl-hydrogen-2-ethylhexyl phosphonate）Containing resins, prepared by the authors. The highest content obtained was 61%. The skeletons of resins have a high specific surface area.The saturation capacities of the resins with P507 content of 43% and 55% are 1.41 and 1.65 meq/g-R, respectively. With dysprosium, the molar ratio of rare earth to P 507 was found to be 1:3 as determined by the saturation method. This may be expressed by:RE³⁺+3HA→ REA₃ + 3H⁺. Prospect of their application in the preconcentration of impurities for emission spectrographic analysis and in the preparation of high purity rare earths is quite promising.更多还原