Precipitation of metal-cupferron complexes from homogeneous solution-I: determination of copper.
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.
Heyn
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Department of Chemistry, Boston University, Boston 15, Mass., U.S.A.
Dave
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