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in solvent extraction
A deposit or emulsion at the interface between two partially settled phases.
Notes:
  1. The phenomenon of crud formation arises from many causes and this definition does not imply any single one.
  2. Other terms -- some unprintable -- have been used but crud is the generally accepted term.
Source:
PAC, 1993, 65, 2373 (Nomenclature for liquid-liquid distribution (solvent extraction) (IUPAC Recommendations 1993)) on page 2387
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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.
Last update: 2008-10-07; version: 2.0.2.
DOI of this term: doi:10.1351/goldbook.C01423.
Original PDF version (may be out of date): http://www.iupac.org/goldbook/C01423.pdf.
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