Abstract: The sample of purple sweet potato was digested with HNO3 and H2O2 in MDS-6 microwave digestor and 13 trace elements in the solution were determined by ICP-MS.The spectral inferences were eliminated by the technique of dynamic reaction cell (DRC).Under the optimized conditions,values of detection limit (3S/N) of the method found were in the range of 0.015-1.890 μg·L-1.The proposed method was applied to the determination of micro-amount of elements in purple sweet potato,giving values of recovery found by standard addition method ranged from 94% to 102%.