Browsing by Author "Wooding, R. A."

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    Double Membrane Diaphragm Technique for Absolute Measurements of Diffusion Coefficients
    (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1972, 68 (4), 1972) Elrick, D. E.; Smiles, D. E.; Wooding, R. A.;
    A new technique for measuring diffusion coefficients utilizing two thin porous membranes separated by a spacer of known cross-sectional area and thickness is presented. The method permits absolute measurements of diffusion coefficients of chemical and biological materials in solution. The technique is based on the free-diffusion space between two membranes, thus avoiding the problems of solute-membrane interactions and tortuosity of the pore space that are present with single membrane diaphragms. Diffusion coefficient measurements of 5 x 10~4 M NaCl and 5 x 10-4 M KC1 arc in good agreement with values reported in the literature