Summary
Four organic thiohydrazides, e. g.,α-naphthalenethiocarboxhydrazide, 2-pyrrolethiocarboxhydrazide, 2-furanthiocarboxhydrazide and 2-thiophenethiocarboxhydrazide are employed as reagents for the spectrophotometric determination of ruthenium, rhenium, osmium and platinum in the presence of considerable excess of diverse metal ions commonly associated with them. The coloured complexes, formed by the reagents with the metals, are stable for more than 12 hr and follow Beer's law at the wavelength of maximum absorbance. The molar absorptivities are in the 104 range for the metal complexes studied.
Zusammenfassung
Alpha-Naphthalinthiocarboxhydrazid, 2-Pyrrolthiocarboxhydrazid, 2-Furanthiocarboxhydrazid und 2-Thiophenthiocarboxhydrazid wurden als Reagenzien für die spektrophotometrische Bestimmung von Ruthenium, Rhenium, Osmium und Platin in Gegenwart beträchtlicher Überschüsse verschiedener, damit üblicherweise vergesellschafteter Metallionen verwendet. Die dabei gebildeten gefärbten Komplexverbindungen sind mehr als 12 Stunden beständig und folgen dem Beerschen Gesetz bei der Wellenlänge maximaler Extinktion. Die molaren Absorptionen liegen in der Größenordnung 104.
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Shome, S.C., Nandy, S., Guhathakurta, A. et al. Spectrophotometric determination of ruthenium, rhenium, osmium and platinum with organic thiohydrazides. Mikrochim Acta 70, 343–357 (1978). https://doi.org/10.1007/BF01201628
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DOI: https://doi.org/10.1007/BF01201628