Abstract：The impurity elements in uranium-zirconium alloy fuel influence the safety of operation. Therefore, it is of great significance to accurately determine the contents of Ca, Li, Mg and Na. The samples were firstly dissolved with nitric acid-hydrofluoric acid. The uranium matrix was quantitatively separated from testing elements in acid medium using UTEVA extraction resin. Ca 422.673nm, Li 670.784nm, Mg 279.553nm and Na 589.592 nm were selected as the analytical lines. The analysis method of Ca, Li, Mg and Na in uranium-zirconium alloy by inductively coupled plasma atomic emission spectrometry (ICP-AES) was established. UTEVA extraction chromatographic column was leached with 1mol/L nitric acid. The decontamination factor of uranium in this separation process was about 4.0×104. The peaking volume of Ca, Li, Mg and Na was in range of 6-10mL, so 10mL of eluent could meet the determination requirements of Ca, Li, Mg and Na. The mass concentration of Ca, Li, Mg and Na in range of 0.025-0.50mg/L had linearity relationship with the corresponding emission intensity, and the linear correlation coefficients were all higher than 0.9990. The limit of detection was between 0.1 and 1.0mg/kg. The contents of Ca, Li, Mg and Na in uranium-zirconium alloy were determined according to the experimental method. The relative standard deviations (RSD, n=6) of determination results were less than 3%. The recoveries were between 90% and 105%.
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