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Sensitive spectrophotometric determination of tin with Pyrogallol Red and cetyldimethylbenzylammonium ions

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Summary

Tin(IV), in the presence of cetyldimethylbenzylammonium chloride (CDBA), forms with Pyrogallol Red (PR) a complex SnPR-CDBA. This complex floates at the interface between hexane and aqueous medium. It dissolves in acetone and can be advantageously used for the determination of tin. The molar absorptivity is 6.5×104 l·mole−1·cm−1 at 480 nm. The method is selective when citric acid is used as masking agent. Phosphate, fluoride, EDTA, nitrite and sulphide interfere.

Zusammenfassung

Zinn(IV) bildet mit Pyrogallolrot (PR) in Gegenwart von Cetyldimethylbenzylammoniumchlorid (CDBA) einen Komplex. Dieser wird flotiert, in Aceton gelöst und zur Bestimmung von Zinn verwendet. Der molare Absorptionskoeffizient bei λ=480 nm beträgt ε=6,5·104 l·mol−1 cm−1. Die Methode ist selektiv, wenn Zitrate zur Maskierung verwendet werden. Es stören Phosphat, Fluorid, ÄDTA, Nitrit und Sulfid.

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Authors and Affiliations

  1. Institute of General Chemistry, Technical University, Łódź, Poland

    Czesław Wyganowski

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  1. Czesław Wyganowski
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Wyganowski, C. Sensitive spectrophotometric determination of tin with Pyrogallol Red and cetyldimethylbenzylammonium ions. Mikrochim Acta 71, 399–403 (1979). https://doi.org/10.1007/BF01197412

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  • DOI: https://doi.org/10.1007/BF01197412

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