[en] The last years improvements in gamma-ray spectrometry instrumentation and methods, and increase of accuracy of nuclear data made possible the use of the absolute method of NAA as a series quantitative multielemental analysis method, competitive with the comparative one. The authors present results of NAA absolute method application on SL-1 (IAEA) and EOP (Radiological Institute Kovice) reference samples. It was used irradiation at a thermal neutron flux of 2.3 x 10¹⁹ n/cm² s and measurement with a Hp Ge Canberra detector coupled to a S100 multichannel system. Computer program SAMPO-90 for processing gamma-ray spectra was used. (Author)