Zimm plot

A diagrammatic representation of data on scattering from large particles, corresponding to the equation:

$K c Δ R θ = 1 M ̄ w P θ + 2 A 2 c + ...$

and used for the simultaneous evaluation of the mass average molar mass, $M ̄ w$ , the second virial coefficient of the chemical potential, $A 2$ , and (usually) the z-average radius of gyration, $s 2 z 1 2$ ; $c$ is the mass concentration of the solute, $Δ R θ$ the excess Rayleigh ratio, and $P θ$ the particle scattering function that comprises (usually) the z-average radius of gyration. $K$ depends on the solute, the temperature and the type of radiation employed. Several modifications of the Zimm plot are in frequent use; the most common one uses the excess scattering instead of the excess Rayleigh ratio.

Source:

Purple Book, p. 66

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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. https://doi.org/10.1351/goldbook.

Last update: 2014-02-24; version: 2.3.3.

DOI of this term: https://doi.org/10.1351/goldbook.Z06748.

Original PDF version: http://www.iupac.org/goldbook/Z06748.pdf. The PDF version is out of date and is provided for reference purposes only. For some entries, the PDF version may be unavailable.

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