Determination of Sn(II) and Sn(IV) Concentrations in Radiopharmaceutical Cold Kits by Differential Pulse Polarography
| i (μA) | mg tin (% Sn(II) or Sn(IV)/total tin) | ||||
| Cold kit | mg total tin | H2SO4, 3 M | HCl, 3 M | Sn(II) | Sn(IV) |
| DMSA | 0.213 | −0.202 | −0.208 | 0.192 ± 0.003 (90.0) | 0.211 ± 0.004 (98.9) |
| ECD | 0.065 | −0.152 | −0.204 | 0.042 ± 0.001 (64.9) | 0.625 ± 0.002 (96.6) |
| MDP | 0.519 | −0.201 | −0.202 | 0.483 ± 0.013 (93.2) | 0.499 ± 0.018 (96.1) |
| Pyrophosphate | 1.038 | −0.190 | −0.203 | 0.908 ± 0.023 (87.5) | 1.004 ± 0.032 (96.7) |
n = 9 (triplicate of 3 vials). Data in parentheses are percentages.