liquid–liquid extraction single-drop micro-extraction CHMO:0001603 SDME single-drop microextraction single drop microextraction The process of transferring a dissolved substance from one liquid phase to another (immiscible or partially miscible) liquid phase in contact with it. A microdrop of organic solvent (8 μL), is suspended from the end of Teflon rod immersed in a stirred aqueous solution of the sample. The sample solution is stirred until equilibrium is reached, after which, the drop is retracted into the Teflon rod. microextraction