Table 2.
Chromatographic properties of systems used for the determination of 68Ga-citrate radiochemical purity
| Mobile phase | Stationary phase | 68Ga-citrate (Rf) | 68Ga-chloride (Rf) |
|---|---|---|---|
| Methanol/ammonium acetate 10% (1:1) | Whatman | 0.45 | 0.70 |
| Sodium citrate (0.1 M) | Whatman | 0.63 | 0.70 |
| DTPA (1 mM) pH=5 | Whatman | 0.75 | 0.80 |
| DTPA (10 mM) pH=5 | Whatman | 0.80 | 0.85 |
| Methanol/glacial acetic acid (9:1) | Whatman | 0.26 | 0.50 |
| Sodium acetate (1.5 g)+ acetic acid (0.58 ml) in 100 ml of water | Silica gel | 0.40 | 0.50 |
| Sodium acetate (1.5 g)+ acetic acid (0.58 ml) in 100ml of water | Whatman | 0.70 | 0.40 |
| Acetone/glacial acetic acid (3:1) | Whatman | 0.10 | 0.45 |
| Acetone/glacial acetic acid (3:1) | Silica gel | 0.15 | 0.07 |
| Sodium acetate (0.16 M) | Whatman | 0.80 | 0.53 |
| Sodium acetate (0.16 M) | Silica gel | 0.15 | 0.07 |