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Measurement of the Molecular Size of a Sodium Humate Fraction*

Published online by Cambridge University Press:  06 March 2019

R. L. Wershaw ,
S. J. Heller  and
D. J. Pinckney
R. L. Wershaw
Affiliation:
U. S. Geological Survey Denver, Colorado 80225
S. J. Heller
Affiliation:
U. S. Geological Survey Denver, Colorado 80225
D. J. Pinckney
Affiliation:
U. S. Geological Survey Denver, Colorado 80225
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Extract

Many of the chemical and physical interactions that take place in natural soil-water systems are strongly influenced by the presence of natural organic polyelectrolytes. The most common of these organic polyelectrolytes is humic acid, which is defined as the alkali soluble, acid insoluble fraction of soil organic matter. Over a hundred years of experimental data have demonstrated that a wide variety of different materials having different physical and chemical properties fit this definition. If we are to make any progress in understanding the role of humic materials in soil-water systems, then we must have a classification system which, as far as possible, provides a unique taxonomic definition for each separate molecular species that falls into the category of humic acid.

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 13: Eighteenth Annual Conference on Applications of X-ray Analysis, August 6-8, 1969 , 1969 , pp. 609 - 617
Copyright
Copyright © International Centre for Diffraction Data 1969

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Footnotes

*

Publication authorized by the Director, U.S. Geological Survey.

References

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