Abstract
The measurement of liquid-liquid kinetics in acoustically emulsified media is shown to be conveniently achieved via the monitoring of bulk concentrations. This is exemplified with reference to the extraction of copper from an aqueous solution by the ligand 5-nonyl-salicylaldoxime in ethyl acetate. The speed of the extraction under ultrasound compares favourably with that seen under conventional stirring and the benefits are illustrated with reference to the extraction of copper from industrial effluent.