separation factor, \(\alpha_{\text{A,B}}\)

in liquid-liquid distribution
The ratio of the respective distribution ratios of two extractable solutes measured under the same conditions. \[\alpha_{\text{A,B}} = \frac{D_{\text{A}}}{D_{\text{B}}}\]
  1. By convention the solutes designated as A and B in the above are chosen so as to make α > 1.
  2. The term @S05613@ is not recommended.
  3. The terms @S05563@ @C01124@ and @S05569@ are not synonymous and should not be used.
PAC, 1993, 65, 2373. 'Nomenclature for liquid-liquid distribution (solvent extraction) (IUPAC Recommendations 1993)' on page 2386 (
See also:
Orange Book, 2nd ed., p. 85 (