There is disclosed a method for using 123I to radiolabel SnADAM become an
serotonin transporter radiotracer(123I -ADAM). At first, there is provided SnADAM solution via mixing SnADAM with
ethanol. The SnADAM solution is shaken and further mixed with thin KI solution. The SnADAM solution is mixed with 123I-NH4I solution and H2O2 solution. The SnADAM-123I-NH4I—H2O2 mixture is kept still. Later, the SnADAM solution is mixed with NaHSO3 solution, and the mixture is shaken and further mixed with
buffer solution of saturated Na2HPO4. The SnADAM solution is filled in an Accubond C8 column. The Accubond C8 column is washed with
sterile water for injection to isolate non-reacting 123I ions. The Accubond C8 column is washed with
ethanol, thus providing 123I-ADAM. The 123I-ADAM is blended in normal
saline mixture. Millipore Millex GV is used to filter impurities and
bacteria from the 123I-ADAM solution.