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Indirect spectrophotometric determination of some reducing agents, using phenolphthalin as reagent

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Summary

An indirect method for the spectrophotometric determination of microgram amounts of hydroquinone, hydroxylamine and hydrazine is outlined. A known excess of potassium ferricyanide solution is added to the sample solution to oxidise the compound to be determined; the excess of ferricyanide is then determined spectrophotometrically with phenolphthalin. The method is simple, reproducible and accurate to ±2%.

Zusammenfassung

Ein indirekles Verfahren für die spektrophotometrische Bestimmung von Mikromengen Hydrochinon, Hydroxylamin und Hydrazin wurde beschrieben. Eine gemessene überschüssige Menge Kaliumcyanoferrat(III) wird der Probenlösung zugesetzt, um die Verbindung zu oxydieren. Der Überschuß wird dann spektrophotometrisch mit Phenolphthalin gemessen. Das Verfahren ist einfach und auf ±2% genau.

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References

  1. M. Avron and N. Shavit, Analyt. Biochem.6, 549. (1963).

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  2. T. J. Bydalek, J. E. Poldoski, and D. B. John, Analyt. Chemistry42, 929 (1970).

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  3. S. Shahine and R. Mahmoud, Microchemical J., in press.

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Authors and Affiliations

  1. Chemical Research Laboratory, Faculty of Engineering, Ain Shams University, Abbasia, Cairo, Egypt

    Salah Shahine & Rafaa Mahmoud

Authors
  1. Salah Shahine
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  2. Rafaa Mahmoud
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Shahine, S., Mahmoud, R. Indirect spectrophotometric determination of some reducing agents, using phenolphthalin as reagent. Mikrochim Acta 70, 431–434 (1978). https://doi.org/10.1007/BF01197095

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  • DOI: https://doi.org/10.1007/BF01197095

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