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Determination of oxygen stoichiometry in mixed Mn(III)/Cr(III)-oxides

Bestimmung der Sauerstoff-Stöchiometrie in Mn(III)/Cr(III)-Mischoxiden

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Zusammenfassung

Es werden ein Verfahren sowie Erfahrungen mit der Bestimmung des Sauerstoffüberschusses in Mangan(III)/Chrom(III)-Mischoxiden beschrieben. Die Proben werden in zugeschmolzenen Ampullen mit SalzsÄure in Gegenwart von Eisen(II/III)-ionen aufgelöst. Sauerstoffüberschu\ wird durch Titration von Fe(II) mit Cer(IV)-salz in Gegenwart von Ferroin als Indicator bestimmt.

Summary

The method and experiences with the determination of oxygen Stoichiometry in mixed manganesechromium sesquioxides are described. The decomposition is carried out in sealed glass tubes in hydrochloric acid in presence of a ferro-ferric system. The oxydation state of the analysed materials is determined by titration of Fe2+ ions with a solution of cerium salt, ferroin being used as indicator.

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References

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Authors and Affiliations

  1. Institute of Physics and Institute of Solid State Physics, Czechoslovak Academy of Sciences, Na Slovance 2, CS-18040, Praha 8-Liben, čSSR

    J. Novák & E. Pollert

Authors
  1. J. Novák
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  2. E. Pollert
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Novák, J., Pollert, E. Determination of oxygen stoichiometry in mixed Mn(III)/Cr(III)-oxides. Z. Anal. Chem. 283, 363–364 (1977). https://doi.org/10.1007/BF00442356

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  • DOI: https://doi.org/10.1007/BF00442356

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