Nuevos sistemas redox como indicadores potenciómetros en quelometría

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  • M.P. Hernández Artiga
  • J. Hernández Cañavate

Resumen

This paper belongs to a serie in which platinum electrode is usad instead of mercury for the potentiometric determination of Zn(II), Cd(II), Ni(II), Cu(II) and Pb(II) with barium ethylenediaminetetraacetate, and now, in the presence of the redox indicator systems Au3+/Au° and Tl3+/Tl+ as potentiometric indicators. An explanation of the mechanism in both cases is suggested. The system Tl3+/Tl+ is used only for Pb(II) determination and Au3+/Au° for all the above cited ions. The results obtained are satisfactory up to 0,001 M.

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