Title: absolute preconcentration
Long Title: IUPAC Gold Book - absolute preconcentration
DOI: 10.1351/goldbook.A00027
Status: current

Definition
An operation (process) as the result of which microcomponents are transferred from the sample of larger mass into the sample of smaller mass, so that the concentration of the microcomponents is increased. Examples include the decrease in solvent volume during distillation or evaporation, and the transfer of microcomponents from an aqueous solution into a smaller volume of organic solvent by extraction.

Related Terms
- evaporation: https://goldbook.iupac.org//terms/view/E02227
- extraction: https://goldbook.iupac.org//terms/view/E02301

Source
- PAC, 1979, 51, 1195. 'Separation and Preconcentration of Trace Substances. I-Preconcentration for Inorganic Trace Analysis' on page 1197 (https://doi.org/10.1351/pac197951051195)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/A00027/html
- json: https://goldbook.iupac.org/terms/view/A00027/json
- xml: https://goldbook.iupac.org/terms/view/A00027/xml

Citation: Citation: 'absolute preconcentration' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.A00027
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Accessed: 2026-04-21T08:23:51+00:00