Estudios sobre la oxidación de AEDT-Co(ll) con el anión [Fe(CN)<sub>6</sub>]<sup>3-</sup>: I. Determinación espectrofotométrica de cobalto como AEDT-Co(lll)

Autores/as

  • M.T. Sierra Hernández
  • M.P. Hernández Artiga
  • J. Hernández Cañabate

Resumen

Reaction of cobalt (II) ethylenediaminetetraacetate with hexacyanoferrate (III) ion and the study of the intermediates formed giving Co(EDTA)- and Fe(CN)64- as final producís is described and revised. The redox process were carried out directly at pH 5, and also at pH 3,5 in the presence of AEDT-Zn(II) and zinc (II) ions in excess. In both cases, the spectral characteristics study of reactants supply methods for the spectrophotometric determination of cobalt (II) and Beer's law is obeyed in the range 12 to 120 ppm at 536 nm. Determination of cobalt (II) in the presence of manganese (II) is also possible. Discussion in order to explain the results obtained is reported.

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