Guinier plot

A diagrammatic representation of data on scattering from large particles, obtained at different angles but at the same concentration, constructed by plotting $log 10 Δ R θ$ or $log 10 P θ$ versus $( sin ⁡ θ 2 ) 2$ or $q 2$ and (usually) used for the evaluation of the radius of gyration. $Δ R θ$ is the excess Rayleigh ratio, $P θ$ the particle scattering function, $θ$ the scattering angle and $q$ the length of the scattering vector.

Source:

Purple Book, p. 67

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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.G02712.

Original PDF version: http://www.iupac.org/goldbook/G02712.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 The PDF version is out of date and is provided for reference purposes only.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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