SEPARATION OF GOLD ON A SELECTIVE CHELATING ION-EXCHANGER AND IN-SITUDETERMINATION BY GAMMA-SPECTROSCOPY

For the separation and determination of low gold concentrations in the sub mu g g(-1) range in ore and sediment samples an analytical techni que has been developed, based on the selective adsorption of gold on t he chelating resin, Srafion NMRR, and the in situ determination of the retained gold by instrumental neutron activation analysis (INAA), usi ng the 411.8 keV line of the isotope Au-198. In the case of higher gol d concentrations Au could be directly determined in the ore by the tec hnique of loss-free counting in spite of the high radioactivity of the investigated samples. By the described procedure it was possible to d etermine Au amounts in the range of ng g(-1) sediments.