Summary
A rapid volumetric method for the estimation of persulphate using the persulphate-thiosulphate reaction catalysed by cupric ions has been proposed. The method consists in adding a known excess of standardised sodium thiosulphate solution to the persulphate solution containing 5 ml of 0.01 M copper sulphate solution and after the completion of the reduction of persulphate, titrating the remaining sodium thiosulphate against a standard solution of iodine.
Zusammenfassung
Die durch Kupfer(II)-ionen katalysierte Reaktion zwischen Persulfat und Thiosulfat wird zur raschen, volumetrischen Persulfatbestimmung benutzt. Bei dem Verfahren gibt man zur Persulfatlösung, die 5 ml 0,01 m Kupfersulfatlösung enthält, einen Überschuß an Thiosulfatlösung und titriert nach Beendigung der Reaktion mit Jodlösung zurück.
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References
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Bisht, C.D., Srivastava, S.P. Volumetric method for the estimation of persulphate in aqueous solution. Z. Anal. Chem. 188, 23–28 (1962). https://doi.org/10.1007/BF00501017
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DOI: https://doi.org/10.1007/BF00501017