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Dry-column chromatography of uranium. Application to chemical analysis of monazite and phosphate rock for uranium

Trockensäulenchromatographie des Urans. Anwendung zur chemischen Analyse von Monazit und Phosphorit

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Summary

A dry-column Chromatographic technique has been applied to the separation of uranium from complicated matrices. It has been demonstrated that operating parameters of thin-layer chromatography on silanized silica gel in isopropyl ether-tetrahydrofuran-nitric acid (65∶20∶3) can be transferred to this technique. Chromatograms are thus easily developed on dry packed column with the solvent system of the type used in the TLC. Uranium is eluted off the column and determined with Arsenazo III spectrophotometrically. The technique is successfully applied to the determination of uranium in monazite and phosphate rock samples with good precision and accuracy.

Zusammenfassung

Zur Abtrennung des Urans aus komplizierten Matrices wurde die Trockensäulenchromatographie verwendet. Wie gezeigt werden konnte, lassen sich die Bedingungen der Dünnschichtchromatographie (DSC) auf silanisiertem Silikagel mit Isopropylether-Tetrahydrofuran-Salpetersäure (65∶20∶3) auf das genannte Verfahren übertragen. Chromatogramme sind daher auf trocken geschichteten Säulen mit Lösungsmittelsystemen der DSC herstellbar. Uran wird eluiert und mit Arsenazo III spektrophotometrisch bestimmt. Das Verfahren wurde zur Uranbestimmung in Monazit und Phosphorit erfolgreich angewendet.

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Authors and Affiliations

  1. Laboratory for Analytical Chemistry, Faculty of Engineering, University of Chiba, Yayoi-cho, Chiba, Japan

    Koichi Oguma & Rokuro Kuroda

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  1. Koichi Oguma
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  2. Rokuro Kuroda
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Oguma, K., Kuroda, R. Dry-column chromatography of uranium. Application to chemical analysis of monazite and phosphate rock for uranium. Mikrochim Acta 76, 57–67 (1981). https://doi.org/10.1007/BF01197304

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  • DOI: https://doi.org/10.1007/BF01197304

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