Term: liquid-liquid extraction
https://doi.org/10.1351/goldbook.L03587

Definition:
This term may be used in place of liquid-liquid distribution when the emphasis is on the analyte(s) being distributed (or extracted).

Note: The distinction between the @D01813@ (KD) and the @P04438@ (KDo) or the concentration distribution ratio  (Dc) is reaffirmed and it is recommended that the terms @P04438@, @P04437@ and @E02293@ constant should not be used as synonyms for the (analytical) @D01817@, Dc. A distinction is drawn between the terms solvent and diluent, and the term @E02299@ is now restricted to the active substance in the solvent (i.e. the homogeneous 'organic phase' which comprises the @E02299@, the diluent and/or the modifier) which is primarily responsible for the transfer of solute from the 'aqueous' to the 'organic' phase.

Related Terms:
1) distribution constant (http://doi.org/10.1351/goldbook.D01813).
2) partition constant (http://doi.org/10.1351/goldbook.P04438).
3) partition coefficient (http://doi.org/10.1351/goldbook.P04437).
4) extinction (http://doi.org/10.1351/goldbook.E02293).
5) extractant (<em>in liquid-liquid distribution</em>) (http://doi.org/10.1351/goldbook.E02299).
6) distribution ratio (<em>in liquid-liquid distribution</em>) (http://doi.org/10.1351/goldbook.D01817).

Source: Orange Book, 2nd ed., p. 88 (https://media.iupac.org/publications/analytical_compendium/)

Citation: 'liquid-liquid extraction' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.L03587

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