Assessment of YPA(4) chelating resin for the separation and determination of Pt, Pd, Ru, Rh, and Au in geological samples by ICP-OES

摘要

A chelating resin (YPA(4)) was used for the adsorption of metal ions, and their adsorption properties were studied. The effects of acid media, acidity, and equilibrium time on adsorption behavior of the analytes were examined. It was found that the YPA(4) resin showed different adsorption properties in HNO3 vs. HCl media. In 3.5 mol L-1 HNO3, the noble metal ions (Ag(I), Au(III), Ru(III), Rh(III), Pd(II), Pt(IV), and Bi(III) could be quantitatively adsorbed by YPA(4) with the adsorption capacities ranging from 23.7 mg g(-1) Bi(III) to 95.2 mg g(-1) Au(III). In 3.2 mol L-1 HCl, Au(III), Ru(III), Rh(III), Pd(II), Pt(IV), Cu(II), Sn(II), and Bi(III) retained on the YPA(4) resin, and their adsorption capacities were in the range of 1.25 mg g(-1) Cu(II) to 96.5 mg g(-1) Au(III). The proposed method was successfully applied to the ICP-OES determination of Pt, Pd, Ru, Rh, and An in geological standard reference materials.