SYNTHESIS AND EFFICIENCY OF A SPHERICAL MACROPOROUS EPOXY-IMIDAZOLE COMPLEXING RESIN FOR PRECONCENTRATING TRACE NOBLE-METAL IONS

A new spherical macroporous epoxy-imidazole complexing resin was synth esized simply and rapidly from epoxy resin and used for the preconcent ration and separation of trace noble metal ions from solution samples, The acidity, rate, reuse, capacity and interference on the adsorption of ions on the resin as well as the conditions of desorption of these ions from the resin and mechanism of enrichment for the ions were dis cussed. The results show that the relative standard deviations for the determination of 20 ng ml(-1) Au(III), Ru(III) and Pd(IV) by inductiv ely-coupled plasma atomic emission spectrometry were in the range 0.5- 5.0%. The procedure is applied to metal smeller samples. (C) 1997 Else vier Science B.V.