Abstract
Magnesium isotope separation was investigated by chemical ion exchange with the 1-aza-12-crown-4 bonded Merrifield peptide resin using elution chromatography. The capacity of the novel azacrown ion exchanger was 1.0 meq/g dry resin. The heavier isotopes of magnesium were enriched in the resin phase, while the lighter isotopes were enriched in the solution phase. The single stage separation factor was determined according to the method of Glueckauf from the elution curve and isotopic assays. The separation factors of24Mg2+-25Mg2+,24Mg2+-26Mg2+, and25Mg2+-26Mg2+ isotope pairs were 1.012, 1.024, and 1.011, respectively.
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Abbreviations
- Ceq :
-
metal ion concentration of the standard solution [mole/l]
- Cst :
-
metal ion concentration after equilibrium [mole/l]
- Kd :
-
distribution coefficient
- M:
-
mass of ion exchanger [g]
- N:
-
number of theoretical plated in the column
- V:
-
total volume of solution [ml]
- Vmax :
-
peak elution volume [ml]
- α:
-
separation factor [1 + ε]
- Δm:
-
isotope mass difference unit
- ε/Δm:
-
enrichment factor per mass unit
- ε:
-
enrichment factor [α-1]
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Kim, D.W., Joen, B.K., Kwon, S.H. et al. Separation of magnesium isotopes by 1-aza-12-crown-4 bonded Merrifield peptide resin. Korean J. Chem. Eng. 18, 750–754 (2001). https://doi.org/10.1007/BF02706395
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DOI: https://doi.org/10.1007/BF02706395