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Complexometric titration of submicromole amounts of thorium(IV) with photometric end-point detection

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Summary

Thorium(IV) can be determined in the microgram range by photometric titration with EDTA in the presence of an approximately equivalent amount of the indicator Semi-Xylenol Orange at pH 2 (HClO4). Most other elements do not interfere. Interfering metal ions can be separated from thorium(IV) by electrolysis at a mercury pool cathode.

Zusammenfassung

Mikrogrammengen Thorium(IV) lassen sich durch photometrische Titration mit EDTA in Anwesenheit einer äquivalenten Menge des Indikators Semixylenol-Orange bei pH 2 (HClO4) bestimmen. Die meisten anderen Metalle stören die Bestimmung nicht. Störende Metallionen können durch elektrolytische Abscheidung an einer Quecksilberkathode von Thorium (IV) abgetrennt werden.

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References

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Authors and Affiliations

  1. Laboratory for Analytical Chemistry, University of Amsterdam, Nieuwe Achtergracht 166, Amsterdam, The Netherlands

    C. J. C. Pijpers, L. G. Decnop-Weever, G. den Boef & W. E. van der Linden

Authors
  1. C. J. C. Pijpers
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  2. L. G. Decnop-Weever
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  3. G. den Boef
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  4. W. E. van der Linden
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Pijpers, C.J.C., Decnop-Weever, L.G., den Boef, G. et al. Complexometric titration of submicromole amounts of thorium(IV) with photometric end-point detection. Mikrochim Acta 65, 667–672 (1976). https://doi.org/10.1007/BF01218242

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  • DOI: https://doi.org/10.1007/BF01218242

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