Table 3 Effect of pre-conditioning agent on the elution of [18F]fluoride with aqueous pyridine and 4-OMe-pyridine.
Entry | Eluent solvent | Preconditioning. agent | Total amount (µmol) | 18F recovery (%) | |
|---|---|---|---|---|---|
Pyridine | 4-OMe pyridine | ||||
1 | Water | NaHCO3 | 50 | 0 | 0 |
2 | Water | KOTf | 50 | 0 | 0 |
3 | Water | Na2CO3 | 50 | 0 | 0 |
4 | Water | K2CO3 | 50 | 0 | 0 |
5 | Water | K2HPO4 | 50 | 4 | 24 |
6 | Water | Na2SO4 | 50 | 15 | 48 |
7 | Water | Na2SO4 | 125 | 23 | 55 |
8 | Water | Na2SO4 | 250 | 20 | 53 |
9 | Water | Na2SO4 | 375 | 21 | 59 |
10 | Water | Na2SO4 | 500 | 46 | 66 |
