Individual Extraction Constants of Some Univalent Anions in the Two–Phase Water–Phenyltrifluoromethyl Sulfone System

From extraction experiments and -activity measurements, the extraction constants corresponding to the general equilibrium Cs+(aq) + A– (aq) __Cs+(org) + A– (org) taking place in the two–phase water–phenyltrifluoromethyl sulfone (FS 13) system (A–= I–, ClO4 –, MnO4 –, Br– 3, I– 3, picrate, tetraphenylborate (BPh– 4); aq = aqueous phase, org = FS 13 phase) were evaluated. Furthermore, the individual extraction constants of these 7 anions in the mentioned two–phase system were calculated; they were found to increase in the series of I–< ClO4 – < Br– 3 < MnO4 –, picrate < I– 3 < BPh– 4.