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A new spot test reagent for chromium(VI), vanadium(V), and hexacyanoferrate(III) ions: the schiff base from 4,4′-methylenedianiline and 4-dimethylaminobenzaldehyde

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Summary

A new Schiff base, bis(4-dimethylaminobenzylidine)4,4′-methylenedianiline (I) has been prepared by reacting 4-dimethylaminoben-zaldehyde with 4,4′-methylenedianiline. A 1% solution ofI in conc. sulphuric acid gives a deep red or blood red colour with Cr(VI), and V(V), and a deep rose red colour with [Fe(CN)6]3-. The limits of detection and dilution are 0.7 μg, 1∶71,000 for Cr(VI); 5 μg, 1∶10,000 for V(V); and 7 μg, 1∶7,100 for [Fe(CN)6]3-. Cr(III), V(IV), and [Fe(CN)6]4- do not interfere. The effects of common anions and cations are reported.

Zusammenfassung

Durch Umsetzung von 4-Dimethylaminobenzaldehyd mit 4,4′-Methylen-dianilin wurde eine neue Schiffsche Base hergestellt, deren 1%ige Lösung in konz. Schwefelsäure eine tiefrote oder blutrote Farbe mit Cr(VI) und V(V), eine tiefrosa Farbe mit [Fe(CN)6]3− gibt. Die Nachweisgrenzen bzw. die Grenzkonzentrationen betragen: 0,7 μg, 1∶71000 für Cr(VI), 5 μg, 1∶10000 für V(V) und 7 μg, 1∶7100 für [Fe(CN)]6 3−. Cr(III), V(IV) und [Fe(CN)6]4− stören nicht. Der Einfluß gängiger Anionen und Kationen wird angegeben.

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Authors and Affiliations

  1. The Department of Chemistry, Vikramajit Singh Sanatan Dharma College, 208002, Kanpur, India

    G. S. Johar

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  1. G. S. Johar
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Johar, G.S. A new spot test reagent for chromium(VI), vanadium(V), and hexacyanoferrate(III) ions: the schiff base from 4,4′-methylenedianiline and 4-dimethylaminobenzaldehyde. Mikrochim Acta 63, 61–64 (1975). https://doi.org/10.1007/BF01271522

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  • DOI: https://doi.org/10.1007/BF01271522

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