Extraction of the (C4H9)4N+Co(II)SCN− ion-pair in chloroform and in isoamyl alcohol: Spectrophotometric determination of cobalt |
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| Authors: | J. Hernández-Méndez A. Alonso-Mateos E.J. Martín-Mateos |
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| Affiliation: | Department of Analytical Chemistry, Faculty of Chemistry, University of Salamanca, Spain |
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| Abstract: | When excesses of ammonium thiocyanate and tetrabutylammonium chloride are added to a cobalt(II) solution, a water-insoluble ion-pair is formed; this compound is soluble in chloroform, isoamyl alcohol, and other solvents. The variables which affect the extractions by these two solvents are studied in order to obtain the optimal conditions and two alternative extraction procedures are proposed. Thus, the separation of cobalt as a previous step for its spectrophotometric determination is studied. |
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