separation factor, αA,B

in liquid-liquid distribution
https://doi.org/10.1351/goldbook.S05615
The ratio of the respective distribution ratios of two extractable solutes measured under the same conditions. αA,B=DADB
Notes:
  1. By convention the solutes designated as A and B in the above are chosen so as to make α>1.
  2. The term separation coefficient is not recommended.
  3. The terms selectivity coefficient and selectivity ratio are not synonymous and should not be used.
Source:
PAC, 1993, 65, 2373. (Nomenclature for liquid-liquid distribution (solvent extraction) (IUPAC Recommendations 1993)) on page 2386 [Terms] [Paper]
See also:
Orange Book, 2nd ed., p. 85 [Terms] [Book]
Citation: 'separation factor' 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.S05615 RIS BibTex EndNote
Div. VPDFTextXMLJSONQuantity