IUPAC - fraction extracted (F02503) (2024)

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Version 3.0.1 (6463 Terms)

DOI: 10.1351/goldbook

Jan Kaiser - Content Editor
Stuart Chalk - Technical Editor
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IUPAC - fraction extracted (F02503) (3)

fraction extracted, \(E\)

https://doi.org/10.1351/goldbook.F02503

The fraction of the total quantity of a substance extracted (usually by the solvent) under specified conditions, i.e. \(E_{\text{A}} = \frac{Q_{\text{A}}}{Q_{\text{A}}^{'}}\) where \(Q_{\text{A}}\) is the mass of A extracted and \(Q_{\text{A}}^{'}\) is the total mass of A present at the start.

Notes:

  1. \(E\) may be expressed as a percentage, \(\% \, E\).
  2. The term extractability is qualitative and should not be used as a synonym for fraction extracted.
  3. If the aqueous phase is extracted with \(n\) successive portions of solvent, the phase volume ratio (solvent/feed) being \(r\) each time, the fraction extracted is given by: \[E_{n} = 1 - \left ( rD + 1 \right )^{-n}\] If \(n = r = 1\) and \(E_{1} = \frac{D}{1+D}\) this expression is a concept of value in @C01075@ theory.
  4. The fraction extracted is also known as the @R05206@ factor, especially for a multistage process.

Source:
PAC, 1993, 65, 2373. (Nomenclature for liquid-liquid distribution (solvent extraction) (IUPAC Recommendations 1993)) on page 2384 [Terms] [Paper]

Citation: 'fraction extracted' in IUPAC Compendium of Chemical Terminology, 3rd ed. International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. https://doi.org/10.1351/goldbook.F02503RISBibTexEndNote

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Last revised: February 24, 2014

IUPAC - fraction extracted (F02503) (2024)
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