Mutual interference of gold, platinum and palladium in atomic-absorption spectroscopy

It is shown that the mutual interference between the chlorides of Au, Pt and Pd in AAS using aqueous solutions nebulized into an air-acetylene flame, can be eliminated by using the dithizonates of these metals. This releasing action is ascribed to the formation of noble metal dithizonates. It is further shown that complex formation with dithizone favours the atomization of Au and that such an effect should be considered as due to complexation rather than to some bulk effect of the organic matrix.