1969•Advances in chemistry seriesRequires access
The Enrichment of Lithium Isotopes by Extraction Chromatography
D. A. LEE
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Abstract
Lithium isotopes were fractionated by extraction chromatography. The chemical exchange reaction used was aqueous lithium hydroxide equilibrated with lithium dibenzoyl-methane-trioctylphosphine oxide in dodecane. Granulated Teflon supported a dodecane solution of dibenzoylmethane-trioctylphosphine oxide in dodecane as the stationary phase. The mobile phase was an aqueous solution of lithium hydroxide. The single stage separation factor was 1.003, as determined by frontal analysis at "breakthrough" 6 Li concentrated in the aqueous phase. Separation of lithium isotopes by extraction chromatography was compared with separations made by ion exchange resin chromatography. The nature of the isotopic species involved determined the magnitude of the separation factor.