Term: molar-mass exclusion limit
https://doi.org/10.1351/goldbook.M03978

Definition:
The maximum value of the molar mass or molecular weight of molecules or particles, in a specific polymer solvent system, that can enter into the pores of the porous non-adsorbing material used in size-exclusion chromatography. For particles with molar mass or molecular weight larger than the exclusion limit the separation effect of the size-exclusion chromatography vanishes.

Related Terms:
1) molecular weight (http://doi.org/10.1351/goldbook.M04000).
2) polymer solvent (http://doi.org/10.1351/goldbook.PT07189).
3) exclusion chromatography (http://doi.org/10.1351/goldbook.E02261).

Source: Purple Book, 1st ed., p. 69 (http://old.iupac.org/publications/books/author/metanomski.html)

Citation: 'molar-mass exclusion limit' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.M03978

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