Studies on extraction of In(III) with 8-hydroxyquinoline

The equilibrium molalities of In³⁺ in extraction reaction: In³⁺(aq)+3HOx(org) = In(Ox)₃(org) + 3H⁺(aq) were measured at ionic strengths from 0.13 to 2.54 mol·kg^?1 in the aqueous phase containing Na₂SO₄ as the supporting electrolyte and at constant initial molality of extractant, HOx, in the organic phase at temperatures from 278.15 to 308.15 K, where HOx and Ox mean 8-hydroxy-quinoline and its anion, respectively. The standard extraction constants K at various temperatures were obtained by two methods proposed in our previous paper.