FIGURE 2. HPLC profile of ¹³¹I quality of aged ¹³¹I solution in blackened delivery vial (3.7 GBq in 500 µL) 4 d after production (A) and after adjustment of pH, transfer to reaction vial, and addition of ascorbic acid (B). Percentages: (A) 13% ¹³¹IO₃^- (retention time [R_t], 1.7 min), 79% ¹³¹I^- (R_t, 5.0 min), 8% unidentified ¹³¹I components. (B) 100% ¹³¹I^- (R_t, 5.0 min).

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