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Separation of High Purity Terbium Using Extraction Chromatography
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1999, v.12 no.5, pp.370-374
Lee,
K., Park,
M., Park,
K., Lee,
H., &
Piao,
Z.
(1999). Separation of High Purity Terbium Using Extraction Chromatography. Analytical Science and Technology, 12(5), 370-374.
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Abstract
Extraction chromatography was used to scarch optimum separation conditions of terbium. Stationary phase was 2-ethylhexyl-2-ethylhexyl phosphonic acid(HEH[EHP])levextrel (-100~+150 mesh), column size was <TEX>${\Phi}20{\times}530mm$</TEX> and kept constantly temperature at <TEX>$50^{\circ}C$</TEX>, adsorption flow rate of <TEX>$0.2mL/cm^2{\cdot}min$</TEX>, elution flow rate of <TEX>$1.0mL/cm^2{\cdot}min$</TEX>, column diameter to packing height of 1:15. But to search optimum separation conditions of terbium, it changed the eluent acidity, the loading weight of sample. the composition of sample. In conclusion, acidity was 0.6 N HCl, loading weight of sample was about 5% and composition of sample was <TEX>$Gd_2O_3(20%)+Tb_4O_7(60%)+Dy_2O_3(20%)$</TEX>. Moreover purity of separated terbium by ICP-AES analysis was 99.98% in yield of 99.99%.
- keywords
- extractioll chromatography, terhlum, separatioll factor, eluent acidity
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