Method and importance of obtaining humic and fulvic acids of high purity

Journal of Research of the U.S. Geological Survey
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Abstract

A detailed procedure incorporating centrifugation, pressure filtration, dialysis, resin exchange, and freeze drying is given for the extraction and purification of fulvic and humic acids from soils and sediments. By use of the procedure humic acids have been prepared which have less than 0.22 percent ash. The isolation of relatively ash-free natural organic matter preparations is an essential prerequisite to the characterization of organic reactivity in natural systems. Inorganic impurities of amorphous and crystalline clay minerals and various inorganic metal ions often lead to numerous complications and errors during experimentation with organic matter because the inorganic substances associated with the organic phase cause variable reactivity of the organic substances.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Method and importance of obtaining humic and fulvic acids of high purity
Series title Journal of Research of the U.S. Geological Survey
Volume 4
Issue 1
Year Published 1976
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Description 4 p.
First page 37
Last page 40
Online Only (Y/N) N
Additional Online Files (Y/N) N