Summary
Separation of lithium and magnesium isotopes was investigated by chemical ion exchange with a manganese(IV) oxide using an elution chromatography. The capacity of manganese(IV) oxide was 0.5 meq/g. Two molar sodium acetate solution was used as an eluent. The heavier isotopes of lithium and magnesium were enriched in the solution phase, while the lighter isotopes were enriched in the MnO2 phase. The separation factors were determined according to the method of Glueckauf from the elution curves and isotopic assays. The separation factor of lithium isotopes was 1.026. In addition, the separation factors of 24Mg2+–25Mg2+, 24Mg2+–26Mg2+, and 25Mg2+–26Mg2+ isotope pair fractionations were 1.012, 1.022, and 1.011, respectively. The isotope separation system in this work can be explained by the fact that the hydration and isotope mass effects are more significant.
© Oldenbourg Wissenschaftsverlag, München
