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Anion-exchange separation of quadri- and sexivalent selenium with DEAE-cellulose in formic acid media

Trennung von vier- und sechswertigem Selen durch Anionenaustausch an DEAE-Cellulose in ameisensäurehaltiger Lösung

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Zusammenfassung

Se(VI) wird aus 0,1– 6 M Ameisensäurelösung an DEAE-Cellulose stark adsorbiert, Se(IV) dagegen nur geringfügig. Dieser Unterschied gestattet eine wirkungsvolle Trennung an einer kleinen Säule. Die Bestimmung erfolgt in beiden Fällen durch Fällung als Bleiselenat, Auflösung in überschüssiger ÄDTA und Rücktitration mit Mn-Sulfat.

Summary

Se(VI) is adsorbed strongly on DEAE-cellulose from 0.1–6 M formic acid solution, while Se(IV) is adsorbed only slightly from the same media. This favourable difference in adsorption allows an effective separation of Se(IV) and Se(VI) to be achieved on a small column. Determination is performed in both cases by precipitation as lead selenate, dissolution in excess EDTA and back-titration with Mn sulphate solution.

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References

  1. Kuroda, R., Oguma, K., Otani, M.: J. Chromatog.96, 223 (1974)

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  2. Ueno, K.: Chelometric titration (in Japanese). Tokyo: Nankodo 1972

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Authors and Affiliations

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

    K. Oguma & R. Kuroda

Authors
  1. K. Oguma
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  2. R. Kuroda
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Oguma, K., Kuroda, R. Anion-exchange separation of quadri- and sexivalent selenium with DEAE-cellulose in formic acid media. Z. Anal. Chem. 277, 111–112 (1975). https://doi.org/10.1007/BF00602078

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  • DOI: https://doi.org/10.1007/BF00602078

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