Task-specific ionic liquid trioctylmethylammonium salicylate as extraction solvent for transition metal ions

Abstract A quaternary ammonium-based room temperature ionic liquid trioctylmethylammonium salicylate (TOMAS) has been studied as an extractant of transition metal ions (Fe 3+ , Cu 2+ , Ni 2+ , Mn 2+ ) in aqueous solutions. The effect of pH value on the recovery of metal ions has been investigated. The mechanism of extraction into the ionic liquid has been proposed. The possibility of stripping voltammetric determination of transition metals in aqueous solutions using TOMAS-modified electrodes has been demonstrated.