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Surface Area Determination of Soils by Adsorption of Ethylene Glycol Vapor
Author(s) -
Morin R. E.,
Jacobs H. S.
Publication year - 1964
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/sssaj1964.03615995002800020019x
Subject(s) - monolayer , adsorption , ethylene glycol , bentonite , moisture , soil water , hysteresis , chemistry , materials science , chemical engineering , analytical chemistry (journal) , chromatography , organic chemistry , nanotechnology , geology , soil science , physics , quantum mechanics , engineering
Surface area was determined from ethylene glycol (EG) retained by vapor‐wetted soils and clays in equilibrium with EG‐bentonite or ‐resin buffers. The method compared favorably with previously proposed equilibrium and nonequilibrium methods. Only small excesses of EG are adsorbed by vapor‐wetted samples. This reduces equilibration time, extends buffer life, and eliminates hysteresis on the drying curve at the monolayer point. The determination is independent of sample size; moderate temperature fluctuations; or moisture present in EG, buffer, or sample. Use of redistilled EG is not necessary. The monolayer end point can be determined using a series of EG‐bentonite buffers independently of other methods. Buffers containing more than a monolayer of EG can be used if suitable corrections are made.