[Ion floatation-spectrophotometric determination of palladium(II) content in acetaldehyde catalyst]

The nature of palladium (I) and copper (II) is very similar, so it is very difficult to determine trace palladium (II) in the coexistence of a great quantity of copper (II). This paper applied ion floatation-spectrophotometric principle, using 1-(2-pyridylazo)-2-naphthol (PAN) as collector, and through controlling pH of the solution and determination wavelength, without separation to determine palladium (II) content in acetaldehyde catalyst with a great quantity of copper (II). The relative error was 0.61%, and RSD was 2.33%. The results were satisfactory.