Separatory funnel

Separating funnel in use. The organic phase (yellow, upper phase) has a lower density than the aqueous phase (lower phase). The aqueous phase is being drained into the beaker.

A separatory funnel, also known as a separation funnel, separating funnel, or colloquially sep funnel, is a piece of laboratory glassware used in liquid-liquid extractions to separate (partition) the components of a mixture into two immiscible solvent phases of different densities.[1] Typically, one of the phases will be aqueous, and the other a lipophilic organic solvent such as ether, MTBE, dichloromethane, chloroform, or ethyl acetate. All of these solvents form a clear delineation between the two liquids.[2] The more dense liquid, typically the aqueous phase unless the organic phase is halogenated, sinks to the bottom of the funnel and can be drained out through a valve away from the less dense liquid, which remains in the separatory funnel.[3]

  1. ^ "Use of Separating Funnel, A Separation of Mixtures Process | Tutorvista.com". Archived from the original on 2010-12-09. Retrieved 2016-12-12.
  2. ^ "Archived copy" (PDF). Archived from the original (PDF) on 2012-04-25. Retrieved 2011-11-17.{{cite web}}: CS1 maint: archived copy as title (link)
  3. ^ Padìas, Anne B. (2011). Making the Connections2: A How-To Guide for Organic Chemistry Lab Techniques.Plymouth, Michigan: Hayden-McNeil Publishing, p. 129.

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