The use of potassium mercuri-selenocyanate as a reagent in qualitative microanalysis
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(1) Potassium mercuri-selenocyanate was prepared and its reactions with the cobaltous, nickelous, ferric, ferrous, manganous, zinc, and cadmium ions were investigated. The limits of identification for these ions were determined.
(2) The behaviour of mixtures of these ions was investigated and a large number of limiting proportions were determined. This work required the use of specially purified salts for the preparation of test solutions.
(3) Potassium mercuri-selenocyanate was found to be a good reagent in testing the purity of cobalt salts. It may be used as a preliminary test in testing the purity of cobalt compounds intended for standard measurements, e. g., the determination of the atomic weight. Potassium mercuri-selenocyanate forms crystalline precipitates with the copper, nickel, and iron ions whose yellow to brown colors stand out in strong contrast to the blue of cobalt mercuri-selenocyanate.
(4) The composition of potassium, zinc, and cadmium mercuriselenocyanates were found by the micro-Kjeldahl method to be K2Hg(CNSe)4, ZnHg(CNSe)4 and CdHg(CNSe)4.
KeywordsCobalt Cadmium Mixed Crystal Cobalt Salt Cadmium Complex
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- 2.M. N. Short, Microscopic Determination of the Ore Minerals, U. S. Geological Survey Bulletin 825.Google Scholar
- 4.M. N. Short, l. c.Google Scholar
- 5.T. W. Richards andG. P. Baxter, Proc. Am. Acad.,35, 61 (1899).Google Scholar
- 6a.W. Crookes, Liebig’s Annalen,78, 177 (1851).Google Scholar
- 6b.T. Schjellerup, Liebig’s Annalen,109, 125 (1859).Google Scholar
- 7.T. W. Richards andG. P. Baxter, l. c.Google Scholar
- 8.T. W. Richards andA. S. Cushman, Proc. Am. Acad.,33, 97 (1927).Google Scholar
- 9.A. Hollard andL. Bertiaux, Metall-Analyse auf electrochemische Weise. Berlin 1906.Google Scholar
- 10.This formula was suggested byC. A. Cameron andE. W. Davy (Chem. News,44, 63 (1881), who first prepared the complex salt, but did not analyze it.Google Scholar