Аннотация:Sorption is considered now as a main tool in hydrometallurgy of platinum metals (PMs) and silica with chemically attached ligands serve as sorbents in real technologies for selective extraction and separation of PMs. Here we present the results of our study of the interaction of palladium(II), platinum(II,IV), rhodium(III) and iridium(III,IV) ions in chloride solutions with following N-, S- and N,S-ligands attached to silica surface.