Fig. 4
From: Production of [211At]NaAt solution under GMP compliance for investigator-initiated clinical trial
Typical chromatogram of NaI standard solution and [211At]NaAt solution. (a) I− was measured at 254 nm and its RT was approximately 5.6 min. (b) [211At]At− was measured by a radioactivity detector using a 250 µL semi-preparative sample loop to ensure sufficient peak area and its RT was approximately 8.9 min. Unknown radiochemical impurities appeared at approximately 5.0 and 7.0 min