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Extraction of gallium with tetraphenylarsonium chloride

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Summary

Gallium is completely extracted with tetraphenylarsonium chloride from hydrochloric acid medium. The extraction behavior was studied by determining gallium with complexometric titration using gallocyanine indicator, spectrophotometrically with rhodamine B, and also with gallium-72 tracer. Complete extraction is observed from ≧ 2.5M hydrochloric acid; the extractable species is GaCl4 −, (C6H5)4As+. In the presence of lithium chloride (total chloride ion concentration 2.5M) complete extraction occurs at hydrochloric acid concentrations ≧ 0.25M. The following ions do not interfere: aluminum, thallium, zinc, cadmium, mercury, cobalt, nickel, permanganate, molybdate, tungstate, tin, phosphate and fluoride.

Zusammenfassung

Gallium läßt sich aus salzsaurem Medium vollständig mit Tetraphenyl-arsoniumchlorid extrahieren. Das Extraktionsverhalten wurde durch Bestimmung des Galliums komplexometrisch mit Gallocyanin als Indikator, spektrophotometrisch mit Rhodamin B und radiometrisch mit72Ga untersucht. Vollständige Extraktion erhält man, wenn die Salzsäure mindestens 2,5-m ist, wobei (C6H5)4As[GaCl4] extrahiert wird. In Gegenwart von Lithiumchlorid genügt eine geringere Salzsäurekonzentration, wenn [Cl−]≧2,5. Folgende Ionen stören nicht: Al3+, Th+, Zn2+, Cd2+, Hg2+, Co2+, Ni2+, MnO4 −, MoO4 2−, WO4 2−, Sn2+, PO4 3− und F−.

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Authors and Affiliations

  1. Department of Chemistry, Brooklyn College of the City University of New York, 11210, Brooklyn, N. Y., USA

    H. L. Finston & M. S. Rahaman

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  1. H. L. Finston
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  2. M. S. Rahaman
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Additional information

This work was partially supported by the U. S. Atomic Energy Commission, Contract No. At (30-1)-3417.

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Finston, H.L., Rahaman, M.S. Extraction of gallium with tetraphenylarsonium chloride. Mikrochim Acta 57, 78–83 (1969). https://doi.org/10.1007/BF01216667

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  • DOI: https://doi.org/10.1007/BF01216667

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