Summary
N-Hydroxy-N- (p- chlorophenyl)-N′-(2,3-dimethylphenyl)-p-toluamidine hydrochloride reacts with Fe3+, V5+ and Mo5+ in thiocyanate media, giving water-insoluble mixed complexes, extractable into benzene. The large differences in the analytical conditions for formation of the mixed complexes of these elements affords a simple, rapid and sensitive extraction-photometric method for determination of these elements at microgram levels. Cr3+, Mn2+, W6+, Ti4+ and Zr4+ do not interfere. The method has been applied for determination of these elements in artificial mixtures.
Zusammenfassung
N-Hydroxy-N-(p-chlorphenyl)-N′-(2,3-dimethylphenyl)-p-toluamidinhydrochlorid reagiert mit Fe(III), V(V) und Mo(V) in thiocyanathältigem Medium unter Bildung wasserunlöslicher, gemischter Komplexe, die sich mit Benzol extrahieren lassen. Die großen Unterschiede der für die Bildung dieser Komplexe erforderlichen analytischen Bedingungen bieten die Voraussetzung für eine einfache, rasche und empfindliche extraktions-photometrische Methode zur Bestimmung dieser Elemente im Mikrogramm-Maßstab. Cr(III), Mn(II), W(VI), Ti(IV) und Zr(IV) stören nicht. Das Verfahren wurde an Hand künstlicher Gemische erprobt.
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Kharsan, R.S., Patel, K.S. & Mishra, R.K. The extractive-photometric determination of Iron(III), vanadium(V) and molybdenum(V) as mixed complexes with thiocyanate and N-hydroxy-N-(p-chlorophenyl)-N′-(2,3-dimethylphenyl)-p-toluamidine hydrochloride. Mikrochim Acta 71, 353–360 (1979). https://doi.org/10.1007/BF01197405
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DOI: https://doi.org/10.1007/BF01197405