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This article in SSSAJ

  1. Vol. 37 No. 4, p. 535-537
    Received: Jan 2, 1973
    Accepted: Apr 3, 1973

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A Comparison Between Mercury Injection and Nitrogen Sorption as Methods of Determining Pore Size Distributions1

  1. I. D. Sills,
  2. L. A. G. Aylmore and
  3. J. P. Quirk2



A comparison of mercury injection and nitrogen sorption methods of pore size distribution analysis was made on a sample of goethite using the slit-shaped pore model. Using the commonly accepted contact angle of 140° for mercury, the mercury pore-size distribution plot is displaced by approximately 20% in plate separation with respect to the nitrogen plot. The assumption of a contact angle of 153° for mercury is required to make the plots coincide. This value is regarded as not unrealistic. Combination of the two techniques provide a useful method of pore size distribution analysis over a continuous range of pore sizes from 10Å to 50µm. This approach is particularly appropriate to the investigation of the pore structure of soil materials.

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