College of Earth Sciences, Jilin University, Changchun 130061, China

A method for the determination of 15 rare earth elements in molybdenite by inductively coupled plasma mass spectrometry was established. Indium was used as internal standard to eliminate the matrix interference effect and the working parameters of ICP-MS were optimized. The detection limit of the instrument was 0.000 9~0.002 9 μg/L, and the recovery of the standard material was 99%~104%. The relative standard deviation (RSD) of molybdenum standard sample is 2.1%~6.7%, which is consistent with the standard value. Based on the standard material determination and standard addition recovery method，the REE analysis results of three molybdenite samples from Chang'anpu molybdenum deposit in Shulan, Jilin Province, of which the relative standard deviation (RSD) is less than 5%，showed that the experimental method can be used for the accurate determination of rare earth elements in molybdenite.