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Determination of serum iron and zinc by atomic absorption spectroscopy

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Summary

This paper presents a rapid sensitive atomic absorption spectroscopic method for the simultaneous determination of serum iron and zinc levels. It is also applicable to the detection of these metals in urine. The technique is based on the ability of pyridine-2-aldehyde-2-pyridyl hydrazone (PAPHY) to form stable cationic bis complexes with iron or zinc, in the +2 oxidation state, while in an aqueous medium. When the pH of the medium is shifted towards the alkaline side, the charged complexes attain neutrality and are quantitatively extractable into an organic solvent. Thus, the metals are free of the interfering effects of serum constituents, and are easily estimated by atomic absorption spectroscopy.

Zusammenfassung

Eine rasche und empfindliche Methode zur gleichzeitigen Bestimmung von Eisen und Zink im Serum durch Messung der Atomarabsorption wurde angegeben. Sie eignet sich auch zum Nachweis der beiden Metalle im Harn. Sie beruht auf der Bildung stabiler kationischer Bis-Komplexe des zweiwertigen Eisens oder Zinks in wäßriger Phase mit Pyridin-2-aldehyd-2-pyridylhydrazon (PAPHY). Wird das pH nach der alkalischen Seite verschoben, so verlieren die Komplexe ihre Ladung und werden mit einem organischen Lösungsmittel extrahierbar. Sonstige Serumbestandteile stören nicht.

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Lee, KT., Jacob, E. Determination of serum iron and zinc by atomic absorption spectroscopy. Mikrochim Acta 62, 65–72 (1974). https://doi.org/10.1007/BF01271418

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  • DOI: https://doi.org/10.1007/BF01271418

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