A mixture, consisting of trioctylamine and 2-ethyl hexanoic acid dissolved in toluene, extracts metal salts as well as water from aqueous salt solutions. Water uptake measurements showed a linear increase with salt concentration. IR spectra revealed -OH vibrations of both “free” and “associated” hydroxyl, which differ from those of bulk water. Data treatment of water uptake in accordance with Hogfeldt's model indicated the formation of mixed reversed micelles consisting of metal-salt-loaded mixed extractant and free extractant molecules. Micellization was also confirmed by osmometric measurements.