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KMID : 1059519900340010069
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Journal of the Korean Chemical Society
1990 Volume.34 No. 1 p.69 ~ p.75
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The Separation and Determination of Rare Earth Elements by Ion-Association Chromatography
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Lee Seung-Hwa
Lee Chul
Chung Koo-Soon
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Abstract
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An ion-association chromatography was applied for the separation and determination of individual rare earth elements (REE) contained in mineral monazite. Prior to the determination, the group separation of REE was achieved by a cation exchange column of Dowex 5OW-X8 resin. The quantitative recovery of REE by the resin column, free from coexisting elements in monazite, was confirmed with radioactive tracers as well as with ICP-MS. Individual REE at ppm level was separated on reversed-phase column (μ-Bondapak C18) using gradient elution from 0.05 to 0.3 M α-hydroxyisobutyric acid at pH 4.6. The individual REE was detected at 546 nm following post-column reaction with PAR (4-(2-pyridylazo)-resorcinol monosodium salt).
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