Liquid-liquid extraction method

The present application relates to a method of extracting a dissolved solute from a first liquid to a second liquid. The method comprises the steps of providing an outer chamber; positioning an inner chamber, including a microporous membrane sleeve internally maintaining a frame, within the outer chamber. Further steps of dispensing the first liquid into the outer chamber; and dispensing the second liquid into the inner chamber;wherein the first liquid contacts an exterior of the microporous membrane sleeve and the second liquid contacts an interior of the microporous membrane sleeve. The method finally includes the step of transferring the solute from the first liquid into the second liquid across the pores of the microporous membrane sleeve.