FIELD: extraction, separation and concentration of substances by liquid extraction. SUBSTANCE: static or laminar liquids are brought in contact. One liquid is periodically proportioned from capillary to surface of continuous layer or another liquid for spreading of drops over surface till forming of monolayer. Liquid forming continuous layer is aqueous phase and liquid proportioned by drops is organic phase. Optimally, continuous layer of liquid has thickness of 3 to 6 mm and distance from proportioning capillary to surface of liquid layer does not exceed size of drop. Renewal of contact surface and application of next drops shall be performed in 150-240 s. EFFECT: enhanced efficiency. 4 cl, 2 tbl
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