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  • P-ISSN 1225-0163
  • E-ISSN 2288-8985

Enrichment of Lithium Isotope by an Ion Exchange Resin Containing Azacrown Ether

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1997, v.10 no.6, pp.403-407
Kim, Dong Won
Chung, Yongsoon
Choi, Ki Young
Lee, Yong-Ill
Jeong, Young Kyu
Jang, Young Hun
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Abstract

Separation factor for <TEX>$^6Li$</TEX> and <TEX>$^7Li$</TEX> have 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 lighter isotope, <TEX>$^6Li$</TEX> is concentrated in the solution phase, while the heavior isotope, <TEX>$^7Li$</TEX> is enriched in the resin phase. By Ccolumnl chromatography[0.9cm(I.D)<TEX>${\times}$</TEX>20cm(height)] using 2.0M ammonium chloride solution as an eluent, single separation factor, <TEX>${\alpha}$</TEX>, 1.009. i.e.<TEX>$(^7Li/^6Li)_{resin}$</TEX>/<TEX>$(^7Li/^6Li)_{solution}$</TEX> was obtained by the Glueckauf theory from the elution curve and isotope ratios.

keywords
Lithium isotope separation, separation factor, ion exchange chromatography, azacrown ion exchanger, distribution coefficient


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