Ion-exchange methods for separation

A comprehensive review of the solution chemistry and of solvent extraction and ion-exchange methods for separating platinum metals has been published [1]. 

The development of ion-exchange methods for separating lanthanides and various fission products was instrumental in the development of atomic reactors. Tables of distribution coefficients as a function of pH for almost every cation in the... 

Kovacheva P., Djingova R. Ion-exchange method for separation and concentration of platinum and palladium for analysis of environmental samples by induchvely coupled plasma atomic emission spectrometry. /Vnalyhca Chimica Acta 2002 464 7-13. 

Terbium has been isolated only in recent years with the development of ion-exchange techniques for separating the rare-earth elements. As with other rare earths, it can be produced by reducing the anhydrous chloride or fluoride with calcium metal in a tantalum crucible. Calcium and tantalum impurities can be removed by vacuum remelting. Other methods of isolation are possible. 

Adding immensely to the complexity of the experiment was the absolute necessity for the chemical separation of the one atom of element 101 from the 109 atoms of einsteinium in the target and its ultimate, complete chemical identification by separation with the ion exchange method. This separation and identification would presumably have to take place in a period of hours, or perhaps even one horn or less, since the half-life of new nuclide was unknown. Furthermore, the target material had a 20-d half-life, and one needed a nondestructive technique allowing reuse of the target material. 

Grabinski [12] has described an ion exchange method for the complete separation of the above four arsenic species, on a single column containing both cation and anion exchange resins. Flameless atomic absorption spectrometry with a deuterium arc background correction is used as a detection system for this procedure. This detection system was chosen because of its linear response and lack of specificity for these compounds combined with its resistance to matrix bias in this type of analysis. 

Ion Exchange Method for Removal and Separation of Noble Metal Ions... 

Gaita R., Al-Bazi S.J. An ion-exchange method for selechve separation of palladium, platinum and rhodium from solutions obtained by leaching automotive catalyhc converters. Talanta 1995 42 249-255. 

The use of oxyceljulose as an ion-exchange medium for separating phenolic bacteriostats from the active ingredients of certain official injections was described by Elvidge, Proctor and Baines. The method is of value when it is necessary to separate the bacteriostat in order to determine the active ingredient of a mixture, otherwise the 4-aminophena-zone method above is preferable. 

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