[en] Fourteen metallic impurities in uranium dioxide powder and pellets were analyzed by atomic absorption spectrometry. The effect of uranium on each element and the recovery in the separation processes were intensively studied. Seven elements such as Cu,Fe,Zn, Cr,K,Na and Ni were quantitatively detected without separation from uranium. However, the others-Li,Mn, Mg,Ca,Co,Pb and Cd-should be separated by suing 30% TBP/CCl₄ before the measurement, because of the interference of uranium. In order to establish a routine analytical method for the determination of beryllium in the Be-coated Zircaloy, spectrofluorimetry with morin was employed. Zr and other interfering elements were eliminated by the precipitation with oxine, and then Be was recovered by coprecipitation with Al. This method may be utilized for the trace amount of Be in the other metals and various alloys. (Author)