Non-destructive determination of rhodium in platinum by epithermal reactor neutron activation analysis

Abstract

Activation in connection with Ge(Li) γ-spectrometry proves profitable in determining traces of rhodium (and silver) in pure platinum. As the 556 keV photopeak of¹⁰⁴Rh was chosen for evaluation, its decay behaviour had to be considered. Moreover, a special automatic correction of dead-time and decay was applied. The limit of detection in a single run was 5 ppm.