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Laboratory-scale liquid-liquid extraction. Schematic of a separatory funnel used for laboratory scale (<2L combined volume) extractions of 2 immiscible liquid phases, where "oil" may be any phase less dense than water (typically an organic solvent) and "water" may be any less dense liquid phase, typically an aqueous phase.
Laboratory-scale liquid-liquid extraction. Photograph of a separatory funnel in a laboratory scale extraction of 2 immiscible liquids, see above; liquids are a diethyl ether upper phase, and a lower aqueous phase.
Boiling tea leaves in water extracts the tannins, theobromine, and caffeine out of the leaves and into the water. Solid-liquid extractions at laboratory scales can use Soxhlet extractors (see at right).
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