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Preventing Water Resorption in Weight Loss Determinations
Author(s) -
Kittrick J. A.,
Hope E. W.
Publication year - 1970
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/sssaj1970.03615995003400030048x
Subject(s) - weight loss , resorption , ampoule , moisture , soil water , chemistry , mineralogy , analytical chemistry (journal) , environmental science , chromatography , soil science , medicine , organic chemistry , obesity
An important error in weight‐loss determination is resorption of moisture after heating. This is prevented by heating samples in glass ampules in an aluminum block. The ampules are sealed prior to cooling. The average deviation between duplicates for the procedure is ± 0.03% weight loss, or less, when mineral samples are heated to 300C. Weight losses for several minerals and soils suggest that there is no single time and temperature combination best for all materials, and that heating to 110C gives incomplete weight loss.