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Title: A chromatographic analysis of hindered diffusion of saccharides in silica gels
Authors: Ching, C.B. 
Chu, K.H. 
Keywords: Column liquid chromatography
Diffusion coefficients
Distribution coefficients
Issue Date: Oct-1989
Citation: Ching, C.B., Chu, K.H. (1989-10). A chromatographic analysis of hindered diffusion of saccharides in silica gels. Chromatographia 28 (7-8) : 370-374. ScholarBank@NUS Repository.
Abstract: The chromatographic technique as a means for experimental studies of diffusion in porous solids has been demonstrated. In this paper we report the effective diffusion coefficients which we have chromatographically obtained for two dextran samples and three low molecular weight solutes. The chromatographic method of measuring diffusional resistances in porous solids has the advantages of rapidity and simplicity. This method also provides information on the axial dispersion and distribution of a solute between the moving phase and the solvent held stationary in the pore. The elution curves of a packed column in pulse response experiments were analyzed by the method of moments to give the parameters of interest. The results indicate that pore diffusion of the solutes was appreciably restricted in comparison with diffusion in bulk solution. The degree of hindrance depended on the size of the diffusing substances. © 1989 Friedr. Vieweg & Sohn Verlagsgesellschaft mbH.
Source Title: Chromatographia
ISSN: 00095893
DOI: 10.1007/BF02261017
Appears in Collections:Staff Publications

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