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Oven Drying as a Pretreatment for Surface‐Area Determinations of Soils and Clays
Author(s) -
RatnerZohar Yael,
Banin A.,
Chen Y.
Publication year - 1983
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/sssaj1983.03615995004700050048x
Subject(s) - illite , kaolinite , soil water , montmorillonite , clay minerals , mineralogy , chemistry , environmental chemistry , soil science , geology , organic chemistry
Various procedures for drying soil and clay samples prior to surface area determination have been compared. The study was conducted on various soils—kaolinite, illite, and a number of minerals representing the smectite group. This research showed that 24 h of oven drying rather than P 2 O 5 drying can be applied as a pretreatment for surface‐area determinations of soils and clays by the ethylene glycol monoethyl ether (EGME) method with the exception of illite and illitic soils. Surface‐area determinations following the two drying procedures were highly significantly correlated (at the 1% level) for smectites and soils, exhibiting coefficients of 0.996 and 0.986, respectively, between the oven‐ vs. P 2 O 5 drying. Oven drying results in a 15% decrease in surface area of illite, suggesting that this procedure would not be recommended as a pretreatment for measurements on soils rich in illites. The oven drying procedure saves 4 to 5 d of the surface‐area determination procedure and is applicable to smectites and soils rich in montmorillonite and kaolinite.