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 for color development were studied. The reagent was used for the simultaneous determination of Au(III), Pd(II), and Pt(IV); Amberlyst A-26 macropore anion-exchange resin was used as a means of rapid separation. The method was applied to the determination of Au(III), Pd(II), and Pt(IV) in catalyst materials and anode mud with satisfactory results.
Ma
Donglan
D
College of Chemistry and Environmental Science, The Key Laboratory of Environmental Science and Technology of High Education of Henan Province, Henan Normal University, Xinxiang 453002, China. madwyl@371.net
Ding
Guosheng
G
Wang
Jinye
J