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A semi-automated purification module for the cyclic separation of  99m Tc was designed for production of [ 99m Tc]TcO 4  –  from γ irradiated  100 Mo target. The separation process was carried out by using a 3-column purification system and the final product, [ 99m Tc]TcO 4  – , was obtained in a total volume of 7 mL. To confirm proper separation achieved for  99m Tc, a radio-labeling procedure using DTPA chelator was performed. The radiochemical purity was higher than 95%, which meets the strict radiopharmaceutical requirements. The yielded  99m Tc can be separated with high efficiency from Mo in a quick and repeated way. Loss of  99m Tc radioactivity during such a three-column separation process was not larger than 10%.

A semi-automated module for the separation and purification of 99mTc from simulated molybdenum target