- P-ISSN 1225-0163
- E-ISSN 2288-8985
추출 크로마토그래피를 이용하여 고순도 테르븀의 선택적 분리를 시도하였다. 고정상으로 2-ethylhexyl-2-ethylhexyl phosphonic acid(HEH[EHP]) 추출수지(-100~+150 mesh), 컬럼은 <TEX>${\Phi}20{\times}530mm$</TEX>를 사용하고 온도는 <TEX>$50^{\circ}C$</TEX>로 유지하고, 흡착 유속은 <TEX>$0.2mL/cm^2{\cdot}min$</TEX>, 용출유속은 <TEX>$1.0mL/cm^2{\cdot}min$</TEX>, 컬럼의 높이와 직경의 비는 1:15로 하였다. 용리액의 산도, 시료의 부하량 및 시료의 조성을 변화시켜 테르븀의 분리의 최적조건을 설정하였다. 그 결과, 산도는 0.6 N HCl, 부하량은 약 5%, 시료의 조성은 <TEX>$Gd_2O_3(20%)+Tb_4O_7(60%)+Dy_2O_3(20%)$</TEX>이었다. 그리고, ICP-AES로 테르븀의 분리수율을 구한 결과 99.99% 이었고 순도는 99.98%이었다.
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%.