Abstract
2,2'-Dipyridyl-2-quinolylhydrazone, DPQH, is proposed as a Spectrophotometric reagent for certain metal ions. The composition, extractability and Spectrophotometric characteristics of the complexes formed with 7 metal ions are reported. DPQH appears to be promising especially for palladium(II) and cobalt(II) in selectivity and for zinc(II) and cadmium(II) in sensitivity. A detailed study has been made for the extractive spectrophotometric determination of palladium(II) in the presence of chloride ions.
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