Abstract: A target of Mg alloy is irradiated by deuteron in a cyclotron to produce ~(22)Naat a rate of 2.33×10~4Bq/μA·h, and the ~(22)Na produced is separated and purified bymeans of a cation-type ion exchanger that can remove 99.9% Mg. No γ-nuclidecan be found in the purified ~(22)Na by Ge (Li) multichannel spectrometer.