| Popis: |
The reactions between Pd(II) and four nonpyridinic derivatives of 2-thiohydantoin (5-benzal-2-thiohydantoin, 5-( o -hydroxy)benzal-2-thiohydantoin, 5-( m -hydroxy)benzal-2-thiohydantoin, and 5-anisal-2-thiohydantoin) have been considered. The influence of the different experimental parameters on the formation of the complexes was studied, and the optimum conditions for the determination of palladium were established. The anisal derivative was selected among these four reagents and the spectrophotometric determination of palladium described in detail. The precision of the procedure, expressed in terms of relative standard deviation was 0.9%, and numerous ions that usually interfere in palladium determination, such as Os(VIII), Rh(III), and Ru(IV) (of the platinum group) and Pb(II), Cd(II), Ni(II), Co(II), Zn(II), and others of the transition series, were tolerated. |
