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United States Department of Agriculture

Agricultural Research Service

Title: New Approaches to the Fractionation of Humic Acids

Authors
item Hayes, Mhb - UNIVERSITY OF LIMERICK
item Clapp, Charles

Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: November 5, 2000
Publication Date: N/A

Technical Abstract: The 0.1 M NaOH extract from a Fibric Peat was adjusted to pH 1 and the precipitated humic acids (HAs), recovered by centrifugation, were dissolved in dilute base. The pH was adjusted to 7 and the solution was then filtered through 0.2 micron cellulose acetate filters. Lipid-type substances sorbed to the membranes. The eluate was diluted, adjusted to pH H2 and applied to XAD-8 [(poly)methylmethacrylate] resin. Appropriate manipulations of the resin technology gave four HA fractions that were different compositionally.

Last Modified: 9/29/2014
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