ONLINE PRECONCENTRATION AND SEPARATION OF PALLADIUM, PLATINUM AND IRIDIUM USING ALPHA-AMINO PYRIDINE RESIN WITH FLAME ATOMIC-ABSORPTION SPECTROMETRY

A flow injection on-line microcolumn method has been studied For the s eparation and preconcentration of noble metals, Pd, Pt and Ir, followe d by flame AAS determination. An cc-amino pyridine resin was used as p reconcentration reagent. Non-noble metals studied could be eliminated by 2M HCl solution in the rinsing stage. A group-eluent for all Pd, Pt and Ir was studied. Separation of individual noble metals could also be accomplished using selective eluents. This approach can be used bot h for the separation and determination of Pd, Pt and Ir in samples. Th e sensitivities and the sample frequency have been improved. The metho d has been applied to certified samples.