The Cobalt-Thiocyanate Reaction for the Detection of Cobalt and Thiocyanate
- 123 Downloads
1. Alkali-thiocyanate is a sensitive reagent for the detection of cobalt in presence of 40 to 50% acetone. Ferric iron can be made harmless by addition of an excess of fluoride. A procedure has been developed for the application of the reaction as a micro-and macro test for cobalt. Cupric copper gives a sensitive reaction and must be removed. The thiocyanate is preferable to cyanate as a reagent.
2. A procedure has been described for the micro detection of thiocyanate by evaporating a drop of the solution to be tested with a small drop of cobalt sulfate and moistening the residue with acetone. The formation of a distinctly green solution indicates the presence of thiocyanate. Nitrite interferes.
KeywordsCobalt Thiocyanate Ferric Iron Nickel Sulfate Potassium Iodide Solution
Unable to display preview. Download preview PDF.
- 1).W. Skey, Chem. News16, 201, 324 (1867).Skey describes here a similar test for uranly, molybdate, tungstate, gold, copper and uses aether to shake the coloured substances out.Google Scholar
- 2).H. W. Vogel, Ber.12, 2313 (1879).Google Scholar
- 3).F. Feigl, Oesterr. Chem. Ztg. No. 11 and 12 (1923).Google Scholar
- 4).Pharmac. Weekbl.60, 1285 (1923).Google Scholar
- 5).E. S. Tomula, Acta. chemica Finnica, No. 3–7 (1929).Google Scholar