Y. Zolotov, O. M. Petrukhin, V. N. Shevchenko
Sep 1, 1978
Citations
1
Influential Citations
55
Citations
Journal
Analytica Chimica Acta
Abstract
Studies on the use of diphenylthiourea, hexamethylene-N'-phenylthiourea, N,N-hexa-methylene-N'-isohexylthiourea and di-tert-butylthiourea for the extraction and group concentration of noble metals are reported. A preliminary treatment of solutions of the platinum metals with tin(II) chloride is useful in accelerating the reactions. The chemistry of the extraction and the properties of the extracted compounds are discussed. Hexamethylene-N'-phenylthiourea provides the best selectivity in the presence of copper, whereas the isohexylthiourea derivative provides the greatest solubility.