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Spectrophotometric determination of Pd(II) using 1,3 bis (2′-pyridyl)-1,2-diaza-prop-2-ene

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Summary

The reaction of 1,3 bis (2′-pyridyl)-l,2-diaza-prop-2-ene(PAPHY) with Pd(II) to produce a coloured complex extractable into organic solvents has been used to measure microquantities of Pd(II) in acid solutions. The method is sensitive for Pd(II) concentrations of 5μg and above. Method used involves the reaction of Pd(II) with the ligand PAPHY in an acid medium followed by extraction of the Pd-PAPHY complex into benzene. The red complex has 2 absorption maxima in the visible spectrum, one at 573 nm and the other at 545 nm. The interference by other divalent ions has been studied and found to be negligible.

Zusammenfassung

Die Reaktion von 1,3-Bis-(2′-pyridyl)-1,2-diaza-propen-2 (PAPHY) mit Pd(II) führt zur Bildung einer mit organischen Lösungsmitteln extrahierbaren, gefärbten Komplexverbindung und wurde zur Bestimmung von Mikromengen Pd(II) in sauren Lösungen verwendet. Die Methode eignet sich für 5μg Pd(II) und mehr. Der rote Pd-PAPHY-Komplex wird aus saurem Milieu mit Benzol extrahiert und hat 2 Absorptionsmaxima im sichtbaren Bereich, u. zw. bei 573 nm und bei 545 nm. Störungen durch zweiwertige Fremdionen wurden geprüft und sind vernachlässigbar.

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Seet, AM., Lee, KT. Spectrophotometric determination of Pd(II) using 1,3 bis (2′-pyridyl)-1,2-diaza-prop-2-ene. Mikrochim Acta 62, 235–243 (1974). https://doi.org/10.1007/BF01219683

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  • DOI: https://doi.org/10.1007/BF01219683

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