Abstract
WE have developed recently1 a method for the micro colorimetric estimation of iron as triphenyl-methylarsonium hexathiocyanato ferrate III, (Ph3MeAs)3(Fe(CNS)6), in which this compound was extracted from aqueous solution with o-dichlorbenzene in the presence of about seventy equivalents of tri-phenylmethylarsonium thiocyanate. The orange-red solution had a sharp absorption maximum at 478 mμ. (curve A), the same wave-length as that observed by Woods and Mellon2 for the ammonium salt (NH4)3(Fe(CNS)6) in water.
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References
Dwyer, F. P., and Gibson, N. A., (unpublished work).
Woods, J. T., and Mellon, M. G., Intdust. and Eng. Chem. (Anal. Ed.), 13, 551 (1941).
Bjerrum, J., Chem. Rev., 46, 381 (1950).
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DWYER, F., GIBSON, N. Dissociation of Complex Ions in Non-Aqueous Solvents. Nature 168, 787–788 (1951). https://doi.org/10.1038/168787a0
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DOI: https://doi.org/10.1038/168787a0
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