Separation of trace amounts of Ca2+ and Sr2+ from K+ and Rb+ with a hydrous manganese dioxide ion exchanger.
Extremely large separation factors (greater than 10(2)) were found for Na-Mg, K-Ca and Rb-Sr metal ion pairs on a cryptomelane-type hydrous manganese dioxide (CRYMO) ion exchanger. Ca2+ and Sr2+ ions were quantitatively separated from a thousand times of K+ and Rb+ ions on mole basis, respectively, by using the CRYMO column. The hopeful utilities of the CRYMO are suggested for the radiochemical ion-exchange separation of radiomagnesium and radiostrontium from K and Rb salt targets.
D002118:Calcium / Q000302:isolation & purification*; D007474:Ion Exchange; D007477:Ions; D008345:Manganese; D017895:Manganese Compounds; D010087:Oxides; D011188:Potassium / Q000302:isolation & purification*; D012413:Rubidium / Q000302:isolation & purification*; D013324:Strontium / Q000302:isolation & purification*
D007477:Ions; D017895:Manganese Compounds; D010087:Oxides; D008345:Manganese; D012413:Rubidium; D011188:Potassium; D002118:Calcium; C016552:manganese dioxide; D013324:Strontium