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In 1925 Helmut Fischer of the Siemens Concern
in Berlin succeeded in detecting heavy metal ions by means of
a dithizone process. As a reagent, dithizone is able to
indicate the presence of heavy metal ions in qualitative and
quantitative terms. Dithizone, in binding the metals (binds to
Cu, Zn, Cd, Hg, Pb, Mn, Co, Ni,), form coloured complexes in
the interior of the molecule which are soluble in non-polar
organic solvents. |
