Abstract
The spectrophotometric characteristics of the complexes formed with di-2-pyridylmethanone 2-(5-nitro)pyridylhy-drazone (DPNPH) and eight metal ions are reported. The reagent appears to be promising especially for palladium(ll) and cobalt(ll) in selectivity and for copper(ll), nickel(ll), zinc(ll) and cadmium(ll) in sensitivity. A detailed study has been made for the extractive spectrophotometric determination of up to 2.8 ppm of palladium(ll) in the presence of chloride ions. The molar absorptivity of the complex extracted into 1,2-dichloroethane is 3.78x104 I mol-1 cm-1 at 560 nm. The method is satisfactorily applied to the determination of palladium in some palladium catalysts.
Published Version
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