back washing
[obsolete]
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https://doi.org/10.1351/goldbook.B00585
Often used as a synonym for stripping ; the term is not recommended.
Source:
PAC, 1993,
65
, 2373. 'Nomenclature for liquid-liquid distribution (solvent extraction) (IUPAC Recommendations 1993)' on page 2386 (https://doi.org/10.1351/pac199365112373)