Summary
Fifteen phenolic aldehydes and aldoximes have been investigated as indicators for the direct titration of iron(III) ions with diethylene triaminepentaacetic acid. Six substances are found to be excellent indicators which permit direct titration of iron(III) with DTPA even at pH 1.0. Microtitrations are feasible with these indicators, the minimum titratable amount being 56μg/ml. The process is very selective and can be applied to the analysis of ores and drugs containing iron.
Zusammenfassung
Sechs phenolische Aldehyde bzw. deren Oxime bewährten sich als ausgezeichnete Indikatoren für die direkte Titration von Eisen (III) mit DTPA bei pH 1,0. Die geringste titrierbare Menge beträgt 56μg/ml. Die Reaktion ist sehr selektiv und eignet sich für die Analyse von Erzen und eisenhältigen Drogen.
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References
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Gandhi, M.H., Desai, J.S. Phenolic aldehydes and aldoximes as indicators for direct titration of ferric ions with diethylenetriaminepentaacetic acid (DTPA). Mikrochim Acta 78, 311–315 (1982). https://doi.org/10.1007/BF01206934
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DOI: https://doi.org/10.1007/BF01206934