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Study of dextran solutions by quasielastic light-scattering

✍ Scribed by Naohito Suzuki; Akiyoshi Wada; Katsumi Suzuki

Publisher
Elsevier Science
Year
1982
Tongue
English
Weight
516 KB
Volume
109
Category
Article
ISSN
0008-6215

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✦ Synopsis

The autocorrelation function of the intensity fluctuation of light scattered from dextran solutions, together with the angular dependence of the integrated intensity of the scattered light, has been measured by means of single-photon counting. The data were analyzed by considering the molecular-weight distributions of the samples obtained by gel-permeation chromatography. The molecular-weight dependence of the diffusion coefficient, and the relation between the radii of gyration and the hydrodynamic radii thus obtained, proved that dextran molecules behave as random coils in aqueous solution. The molecular-weight-distribution curve measured by gel-permeation chromatography has been demonstrated to be useful in the analysis of light-scattering experiments for polydisperse, macromolecular solutions.

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