The Asia FLLEX (flow liquid-liquid extraction) module is a flow chemistry equivalent to a separating funnel, yet involves no shaking, nor does it rely on gravity. It is suitable for the preparation of samples prior to analysis, further synthetic steps or purification. The Asia FLLEX is said to be the only commercially available, laboratory-scale flow aqueous extraction system, and can be used with a wide variety of organic solvents that are either more or less dense than water. Membrane technology enables separation of the widest possible range of phase mixtures, including tetrahydrofuran (THF) from aqueous phase, and controls bubble formation, thereby limiting the formation of emulsions that commonly occur using traditional liquid-liquid extractions. — Syrris, Royston, U.K.