Size fractionation of humic substances:
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H.Kipton J. Powell; Eric Fenton
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Article
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1996
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Elsevier Science
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English
⚖ 990 KB
## Humic substances have been extracted from a standard reference peat at pH 2.0, 6.0-6.5, 9.0 and 12.0 using 0.01 M or 0.001 M Na4P207. Humic acids extracted at pH 6.0, 9.0 and 12.0 showed a progressive increase in mean molecular size, as determined by gel permeation chromatography. With increasi