The analytical potential of a fast neutron reactor has been studied. The maximum density of the neutron flux is 2.5·1015 cm–2·s–1 at a maximum energy of 450 keV. The determining reaction for activation analysis at this reactor is an (n, n) reaction. The possibility of selectively determining Pb, Hg, Cd, Au, Ag and other elements at a level of 10–5–10–8% is demonstrated. This activation technique allows rapid determination of these elements.