イオン交換クロマトグラフィーによる銅 (II) 配位子交換系における銅の同位体効果

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  • Isotope Effects of Copper in Cu(II) Ligand-Exchange Systems by Ion Exchange Chromatography.
  • Isotope Effects of Copper in Cu 2 Ligand Exchange Systems by Ion Exchange Chromatography

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The isotope effects of copper in ligand exchange processes were studied by means of chelating ion exchange resin system and EDTA complex/cation-exchange resin system. Two cases of different ionic interactions systems were investigated using chelating ion exchange resin system; Cu-H and Cu-Co systems. Both cases were investigated using the breakthrough technique, while the reverse breakthrough technique was applied in the case of EDTA. The chromatograms obtained from two different chelating resin systems were not ideal but they can be improved in future work. The heavier isotope 65Cu was found to be enriched in the ligand side in all cases, the resin phase in the case of chelating resin and the solution phase in the case of EDTA complex system. The separation coefficients in the two chelating systems were found to be constant and equal to 1.1×10-5. Concerning the EDTA complex system, the chromatogram obtained was ideal one and the separation coefficient was found to be 1.3×10-5.

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