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Enrichment of Lithium Isotope by Novel Ion Exchanger Containing Azacrown Ether as Anchor Group
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1998, v.11 no.4, pp.231-234
Kim,
D. W., Lee,
N., Jeong,
Y. K., Ryu,
H., Kim,
C. S., &
Kim,
B.
G.
(1998). Enrichment of Lithium Isotope by Novel Ion Exchanger Containing Azacrown Ether as Anchor Group. Analytical Science and Technology, 11(4), 231-234.
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Abstract
Separation factor for <TEX>$^6Li$</TEX> and <TEX>$^7Li$</TEX> has been determined using ion exchange resin having 1,7,13-trioxa-4,10,16-triazacyclooctadecane (<TEX>$N_3O_3$</TEX>) as an anchor group. The ion exchange capacity of the <TEX>$N_3O_3$</TEX> ion exchanger was 2.0 meq/g dry resin. The lighter isotope, <TEX>$^6Li$</TEX>, is concentrated in the fluid phase, while the heavier isotope, <TEX>$^7Li$</TEX>, is enriched in the resin phase. By column chromatography [0.3 cm(I.D)<TEX>${\times}$</TEX>30 cm (height)] using 3.0 M ammonium chloride solution as an eluent, single separation factor, <TEX>${\alpha}$</TEX>, 1.018, i.e. <TEX>$(^7Li/^6Li)_{resin}/(^7Li/^6Li)_{fluid}$</TEX> was obtained by the Glueckauf theory from the elution curve and isotope ratios.
- keywords
- lithium isotope, separation, azacrown ion exchanger, capacity, chromatography
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