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fraction collector in chromatographyfractional change of a quantity
fraction extracted, Math - title
The fraction of the total quantity of a substance extracted (usually by the solvent) under specified conditions, i.e. Math - ei where Math - text is the mass of A extracted and Math - text is the total mass of A present at the start.
Notes:
  1. Math - note may be expressed as a percentage, Math - note.
  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 Math - note successive portions of solvent, the phase volume ratio (solvent/feed) being Math - note each time, the fraction extracted is given by:
    Math - e
    If Math - ei and Math - ei this expression is a concept of value in chromatography theory.
  4. The fraction extracted is also known as the recovery factor, especially for a multistage process.
Source:
PAC, 1993, 65, 2373 (Nomenclature for liquid-liquid distribution (solvent extraction) (IUPAC Recommendations 1993)) on page 2384
Related index:
IUPAC > Gold Book > math/physics > quantities
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Cite as:
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A.Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. doi:10.1351/goldbook.
DOI of this term: doi:10.1351/goldbook.F02503
Original PDF version (may be out of date): http://www.iupac.org/goldbook/F02503.pdf.
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