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Determination of perchlorate in samples of potassium chlorate. II

Extraction with tetrabutylphosphonium chloride followed by replacement of the perchlorate by the iron(III)-thiocyanate anion

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Summary

A method of determining perohlorate is described which involves extraction as tetrabutylphosphonium perchlorate intoo-dichlorobenzene and the subsequent indirect determination by measurement of the absorbance of the iron(III)-thiocyanate-tetrabutylphosphonium complex formed by washing the extract with an aqueous solution containing iron(III) and thiocyanate. The method has been successfully applied to the determination of as little as 0.003 per centw/w of perchlorate in samples of potassium chlorate.

Zusammenfassung

Eine Methode der Perchloratbestimmung wurde beschrieben. Tetrabutylphosphoniumperchlorat wird mit o-Dichlorbenzol extrahiert. Der Extrakt wird mit einer wäßrigen, Eisen(III) und Rhodanid enthaltenden Lösung gewaschen, und dann die Absorption des Eisen(III)-Rhodanid-Tetrabutylphosphonium-Komplexes gemessen. Die Methode wurde mit Erfolg zur Bestimmung von nur 0,003% (g/g) Perchlorat in Kaliumchlorat angewandt.

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References

  1. A. J. Bowd andD. Thorburn Burns, Mikrochim. Acta [Wien]1965, 1151.

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Part I: Mikrochimica Acta1970, 888.

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Fogg, A.G., Burns, D.T. & Yeowart, E.H. Determination of perchlorate in samples of potassium chlorate. II. Mikrochim Acta 58, 974–977 (1970). https://doi.org/10.1007/BF01225728

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  • DOI: https://doi.org/10.1007/BF01225728

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