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Analysis of purified uranium compounds for nanogram quantities of beryllium and certain rare earths

Chemical separation and spectrographic determination

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Summary

A sensitive method has been established for the determination of traces of Be, La, Eu, Gd, Dy, Sm and Er in purified uranium compounds. The elements were first separated from uranium by means of a column of TNOA supported by SiO2, followed by a spectrographic determination. By using a modified copper spark technique detection limits between 7·10−4 μg Be and 1·10−2 μg Sm were achieved.

Zusammenfassung

Eine Methode zur Bestimmung von Be, La, Eu, Gd, Dy, Sm und Er in gereinigten Uranverbindungen wird beschrieben. Die genannten Elemente werden mittels Säulenchromatographie abgetrennt mit Tri-n-octylamin als Reagens und SiO2 als Träger. Als abschließende spektralanalytische Bestimmung diente eine abgeänderte “copper spark”-Technik. Nachweisgrenzen in der Größenordnung von 7·10−4 μg für Be und 1·10−2 μg für Sm werden erzielt.

Résumé

Une méthode très sensible a été mise au point pour l'analyse des traces de Be, La, Eu, Gd, Dy, Sm et Er dans l'uranium purifié et ses composés. Les éléments sont d'abord séparés de la matrice au travers d'une colonne de TNOA support SiO2, et ensuite dosés, par voie spectrale. En utilisant la technique “copper spark” convenablement modifiée ont été obtenus des limites de détection comprises entre 7·10−4 μg pour Be et 1·10−2 μg pour Sm.

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Krefeld, R., Rossi, G. & Hainski, Z. Analysis of purified uranium compounds for nanogram quantities of beryllium and certain rare earths. Mikrochim Acta 53, 133–140 (1965). https://doi.org/10.1007/BF01218744

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  • DOI: https://doi.org/10.1007/BF01218744

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