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The News of Altai State University
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S.A. Denisova, A.E. Lesnov, B.I. Petrov

Extraction of Thiocyanate Complexes of Metals in Stratified System Water - Diantipyrylmethane - 2-Naphthalenesulfonic Acid

Interphase distribution of zinc (II), cadmium (II), iron (III), cobalt (II) cations in system water - diantipyrylmethane - 2 - naphthalenesulfonic acid - ammonium thiocyanate is investigated. Extraction of thiocyanate complexes is realized by an anion exchange mechanism. Optimum conditions for extraction and extraction-photometric determination of iron (III) and cobalt (II) are found. The law of Ber is applied in an interval from 20 up to 150 mkg for Co2+ and from 10 up to 100 mkg for Fe3+. The technique is developed on a standard sample of nickel-91b.
Key words: extraction by diantipyrylmethanes, thiocyanate complexes of metal cations.

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