Table 4:
Stability of [18F]FP at different radioactivity concentration over time.
| SN | Fatty acid | Radioactivity Concentration (GBq/mL or mCi/mL) | Time of Post synthesis analysis | Peak I (Unknown) | Peak II (Product) | |||
|---|---|---|---|---|---|---|---|---|
| Retention Time (min) | Relative Percentage | Retention Time | Relative Percentage | |||||
| 1 | [18F]FP | High conc. (4.03 GBq/mL or 108.9 mCi/mL at time zero) | 3.8 GBq/mL (102.2 mCi/mL) | 10 min | Not detected | 7.71 | 100 % | |
| 2.8 GBq/mL (74.6 mCi/mL) | 60 min | 7.68 | 100 % | |||||
| 1.9 GBq/mL (51.1 mCi/mL) | 120 min | 7.52 | 100 % | |||||
| 1.3 GBq/mL (35.0 mCi/mL) | 180 min | 7.52 | 100 % | |||||
| 0.9 GBq/mL (24.0 mCi/mL) | 240 min | 7.53 | 100 % | |||||
| Low conc. (0.226 GBq/mL or 6.1 mCi/mL at time zero) | 0.19 GBq/mL (5.0 mCi/mL) | 30 min | 7.59 | 100 % | ||||
| 0.16 GBq/mL (4.2 mCi/mL) | 60 min | 7.58 | 100 % | |||||
| 0.11 GBq/mL (2.9 mCi/mL) | 120 min | 7.58 | 100 % | |||||
| 0.70 GBq/mL (2.0 mCi/mL) | 180 min | 7.61 | 100 % | |||||
| 0.05 GBq/mL (1.34 mCi/mL) | 240 min | 7.59 | 100 % | |||||
| 2 | [18F]FP | High conc. (3.43 GBq/mL or 92.7 mCi/mL at time zero) | 3.2 GBq/mL (87.0 mCi/mL) | 10 min | 7.70 | 100 % | ||
| 2.4 GBq/mL (63.8 mCi/mL) | 60 min | 7.68 | 100 % | |||||
| 1.6 GBq/mL (43.5 mCi/mL) | 120 min | 7.50 | 100 % | |||||
| 1.1 GBq/mL (29.6 mCi/mL) | 180 min | 7.50 | 100 % | |||||
| 0.76 GBq/mL (20.4 mCi/mL) | 240 min | 7.45 | 100 % | |||||
| Low conc. (0.51 GBq/mL or 13.8 mCi/mL at time zero) | 0.42 GBq/mL (11.4 mCi/mL) | 30 min | 7.59 | 100 % | ||||
| 0.35 GBq/mL (9.5 mCi/mL) | 60 min | 7.60 | 100 % | |||||
| 0.24 GBq/mL (6.5 mCi/mL) | 120 min | 7.60 | 100 % | |||||
| 0.16 GBq/mL (4.4 mCi/mL) | 180 min | 7.58 | 100 % | |||||
| 1.1 GBq/mL (3.0 mCi/mL) | 240 min | 7.58 | 100 % | |||||