Thin-layer chromatography of rare earths in a carboxymethyl cellulose-aqueous sodium nitrate system, and the separation of yttrium

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Other Title
  • カルボキシメチルセルロース‐硝酸ナトリウム水溶液系における希土類元素の薄層クロマトグラフィーとイットリウムの分離
  • カルボキシメチルセルロース-硝酸ナトリウム水溶液系における希土類元素の薄層クロマトグラフィーとイットリウムの分離
  • カルボキシメチルセルロース ショウサン ナトリウム スイヨウエキケイ ニ オケル キドルイ ゲンソ ノ ハクソウ クロマトグラフィー ト イットリウム ノ ブンリ

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Abstract

The adsorption behavior of all the rare earths, except for promethium, was surveyed on carboxymethyl cellulose thin layers in sodium nitrate solutions as a function of the concentration of salt. At lower salt concentrations, the Rf values of the lanthanoids showed an S-shaped variation with their atomic number, and yttrium lay near to lanthanum, relatively analogous to the adsorption behavior in chloride solutions. At higher salt concentrations, the behavior of the metals was considerably different from that in the chloride solutions, and the Rf values of the lanthanoids decreased with an increase of their atomic number. The Rf value of yttrium gradually approached that of europium with increasing salt concentration in nitrate media. Two-dimensional development appeared first with a 0.5 M sodium chloride solution and second with a 5 M sodium nitrate solution, allowing yttrium to be separated from all of the rare earths.<br>

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 53 (11), 1325-1328, 2004

    The Japan Society for Analytical Chemistry

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