Abstract
A method for the extractive spectrophotometric determination of palladium(II) with di-2-pyridyl ketone benzoylhydrazone (DPKBH) has been studied. The method is based on the formation of the palladium(II)-DPKBH complex which is extracted into benzene from sulfuric acid solution in the presence of chloride ions. The extracted species has absorption maxima at 455 and 481nm with the molar absorptivity of 9.38×103 Lmol-1 cm-1 at the former wavelength. Beer′s law is obeyed over the range 0-10μg ml-1 of palladium at 455nm. The proposed method is selective in the presence of tartaric or citric acid and has been satisfactorily applied to the determination of palladium in a dental alloy and in palladium-catalyst samples.
