Abstract :
[en] The invention relates to a method to ext. out of an aq. soln., conc. and/or reformulate [18F] fluorides without any evapn. step, characterized in that the eluting soln. is a low water content, preferably <3% water, org. soln. contg. at least: a first compd. (A) which is a tertiary alc.-function bearing mol., a second compd. (B) which is a phase transfer agent suitable for radiolabeling and which is necessary to the anion exchange process. Said org. solvent is selected from acetonitrile (ACN), DMSO), dimethylacetamide, DMF, THF, di-Et ether, dioxane, Et acetate, acetone, isobutyronitrile, benzonitrile, pyridine, di-Et carbonate, sulfolane, hexamethylphosphotriamide (HMPA/HMPT), and any mix of these solvents. Said nonpolar org. solvent is selected from pentane, hexane, heptane, octane, nonane, decane, and cyclohexane.
