For the selective removal of the matrix activity (24Na,32P and42K) in the neutron activation analysis of biomedical samples the inorganic separators “hydrated antimony pentoxide”, zirconium
phosphate, and titanium phosphate were prepared. The sorption parameters of the samples were determined via elution chromatography
techniques, with appropriate tracers. The basic principles of the sorption processes were investigated, and the experimental
conditions were optimized. These inorganic separators were then applied, combined with a distillation procedure and an ion-exchange
separation, for the determination of the following trace elements in animal blood samples: Mn, Co, Cu, Fe and Zn.