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A study of the spectrophotometric method for the determination of uranium(VI) in trialkylamine/kerosene extracts using 1-(2-pyridylazo)-2-naphthol

Untersuchung der spektralphotometrischen Uran(VI)-Bestimmung in Trialkylamin/Kerosin-Extrakten mit Hilfe von 1-(2-Pyridylazo)-2-naphthol

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Zusammenfassung

Das Verfahren, bei dem ein Uran-PAN-Komplex der Zusammensetzung 1∶1 gebildet wird, kann für einen Konzentrationsbereich von 0 bis 5 g U pro l Extrakt eingesetzt werden. Eine Störung durch Sulfat wird durch dessen Entfernung mit Calciumionen vor der Farbentwicklung verhindert. Störungen durch andere Ionen werden hauptsächlich durch Beeinflussung der Uranextraktion hervorgerufen.

Summary

The Spectrophotometric method for the determination of uranium(VI) in trialkylamine extracts using 1-(2-pyridylazo)-2-naphthol (PAN) as a colorimetric reagent has been examined. The Job and Mole Ratio methods suggest that the coloured product is a 1∶1 complex of uranium and PAN. The method can be applied to cover the concentration range 0 to 5 g uranium per litre of extract. Sulphate interference is eliminated in the method by removal with calcium ions before colour development. Interferences from other ions likely to be present in the aqueous liquor appear to arise largely from inhibition of the uranium partition into the amine phase.

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Authors and Affiliations

  1. The Chemical Laboratories, The University of Kent at Canterbury, CT2 7NH, Kent, England

    Samuel J. Lyle & Massoud Tamizi

  2. Atomic Energy Board, Private Bag X3017, 2125, Randburg, South Africa

    A. Faure

Authors
  1. Samuel J. Lyle
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  2. Massoud Tamizi
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  3. A. Faure
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Lyle, S.J., Tamizi, M. & Faure, A. A study of the spectrophotometric method for the determination of uranium(VI) in trialkylamine/kerosene extracts using 1-(2-pyridylazo)-2-naphthol. Z. Anal. Chem. 307, 194–196 (1981). https://doi.org/10.1007/BF00527485

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  • DOI: https://doi.org/10.1007/BF00527485

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