pH of 18F-FDG with Citric Acid Added
| Initial citric acid concentration (M) | Ratio of citric acid to 18F-FDG (v/v) | pH of 18F-FDG | ||
| Batch 1 | Batch 2 | Batch 3 | ||
| 0 | 0 | 6.58 | 6.59 | 6.61 |
| 0.01 | 1:1 | 4.98 | 4.94 | 4.94 |
| 1:15 | 6.27 | 6.25 | 6.26 | |
| 1:30 | 6.27 | 6.28 | 6.24 | |
| 1:60 | 6.29 | 6.28 | 6.29 | |
| 0.03 | 1:1 | 3.91 | 3.90 | 3.91 |
| 1:15 | 5.84 | 5.83 | 5.84 | |
| 1:30 | 5.89 | 5.90 | 5.88 | |
| 1:60 | 5.88 | 5.87 | 5.87 | |
| 0.05 | 1:1 | 3.54 | 3.49 | 3.47 |
| 1:15 | 5.70 | 5.71 | 5.66 | |
| 1:30 | 5.65 | 5.65 | 5.65 | |
| 1:60 | 5.62 | 5.65 | 5.65 | |
| 0.06 | 1:1 | 3.36 | 3.33 | 3.32 |
| 1:15 | 5.5 | 5.51 | 5.52 | |
| 1:30 | 5.58 | 5.57 | 5.58 | |
| 1:60 | 5.57 | 5.57 | 5.58 | |