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ARS Home » Midwest Area » St. Paul, Minnesota » Soil and Water Management Research » Research » Publications at this Location » Publication #116403
Title: NEW APPROACHES TO THE FRACTIONATION OF HUMIC ACIDS

Author
item HAYES, MHB - UNIVERSITY OF LIMERICK
item Clapp, Charles

Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 11/5/2000
Publication Date: N/A
Citation: N/A

Interpretive Summary:

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.