The cupferron complex of copper has been precipitated from homogeneous solution by the addition of phenylhydroxylamine and sodium nitrite to a cold, acidic solution containing copper(II) ions. The precipitate can be dried at 90 +/- 5 degrees and weighed without ignition to the oxide. Less than 3 mg of copper can be determined. A fairly high concentration of acetic acid is tolerable. Separation from large quantities of zinc, nickel and silver has been achieved.
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Precipitation of metal-cupferron complexes from homogeneous solution-II: determination of titanium.
Talanta
January 1966
Department of Chemistry, Boston University, Boston 15, Mass., U.S.A.
The cupferron complex of titanium has been precipitated by the addition of phenylhydroxylamine and sodium nitrite to a cold acidic solution of the metal. Details of the method are given. Separation of titanium from aluminium, borate, phosphate and vanadate is described.
View Article and Find Full Text PDFPrecipitation of metal-cupferron complexes from homogeneous solution-I: determination of copper.
Talanta
January 1966
Department of Chemistry, Boston University, Boston 15, Mass., U.S.A.
The cupferron complex of copper has been precipitated from homogeneous solution by the addition of phenylhydroxylamine and sodium nitrite to a cold, acidic solution containing copper(II) ions. The precipitate can be dried at 90 +/- 5 degrees and weighed without ignition to the oxide. Less than 3 mg of copper can be determined.
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