Quantitative Separation of Alkaline Earth Metal Ions by Triple-phase Separation Method

The triple-phase separation system has been designed for the first time combining the solvent-extraction and the ion-exchange methods. Owing to the reverse selectivity tendency of the solvent extraction and the ion exchange methods for alkaline earth metal ions (Mg2+, Ca2+, Sr2+ and Ba2+), the quantitative separation could be achieved by the triple-phase separation method.