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Complexometric determination of sulphur in pyrites and sulphides

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Summary

An indirect complexometric method for the determination of sulphur in pyrites and other sulphides is proposed. Sulphur is converted to sulphate by fusion with sodium peroxide, sulphate is precipitated by lead solution at pH 4 and the excess of lead nitrate is back-titrated by EDTA solution in the presence of Xylenol Orange as indicator. The method has been successfully used for numerous sulphur determinations in pyrite, copper, lead and zinc concentrates.

Zusammenfassung

Es wird eine indirekte komplexometrische Methode zur Schwefelbestimmung in Pyriten und anderen Sulfiden beschrieben. Hierbei wird der Schwefel durch eine oxydierende Schmelze mit Na2O2 in Sulfat übergeführt, das Sulfat mit Bleinitrat bei pH 4 gefällt und der Überschuß an Bleinitrat mit ÄDTA gegen Xylenolorange zurücktitriert. Zahlreiche Schwefelbestimmung wurden mit gutem Erfolg in Pyrit sowie Kupfer-, Blei- und Zinkkonzentraten durchgeführt.

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Authors and Affiliations

  1. Bulgarian Academy of Sciences, Institute of General and Inorganic Chemistry, Sofia 13, Bulgaria

    O. Budevsky & L. Pentcheva

Authors
  1. O. Budevsky
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  2. L. Pentcheva
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Budevsky, O., Pentcheva, L. Complexometric determination of sulphur in pyrites and sulphides. Z. Anal. Chem. 203, 14–16 (1964). https://doi.org/10.1007/BF00480270

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  • DOI: https://doi.org/10.1007/BF00480270

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