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A Comparison Between Mercury Injection and Nitrogen Sorption as Methods of Determining Pore Size Distributions
Author(s) -
Sills I. D.,
Aylmore L. A. G.,
Quirk J. P.
Publication year - 1973
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1973.03615995003700040021x
Subject(s) - mercury (programming language) , sorption , nitrogen , mineralogy , contact angle , chemistry , materials science , analytical chemistry (journal) , environmental chemistry , adsorption , composite material , organic chemistry , computer science , programming language
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.