Simultaneous determination of gold(III), palladium(II), and platinum(IV) with N-phenyl- N'-(sodium p-aminobenzenesulfonate)thiourea.

The preparation and characteristics of a new water-soluble reagent, N-phenyl- N'-(sodium p-aminobenzenesulfonate)thiourea (PPT) are described. In the presence of cetyltrimethylammonium bromide (CTMAB) PPT reacts with Au(III), Pd(II), and Pt(IV) to form colored complexes with absorption maxima at 317 nm, 306.1 nm, 778.4 nm, respectively. Optimum conditions… CONTINUE READING