humic acid

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humic acid

A heteropolymeric mixture of organic molecules from biodegradable humis, peat and soil.

humic acid

the precipitate resulting from the addition of acid to a solution of HUMUS. Black in colour, it is insoluble in acids and organic solvents.
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1]H NMR spectrum in aqueous solution of the fulvic acid from the 1:5 coal:[H.
2]) and the fulvic acid fraction of the metal--organic-complex-bound Cd (r = 0.
Zalba P, Quiroga AR (1999) Fulvic acid carbon as a diagnostic feature for agricultural soil evaluation.
The transformation of peat organic matter by chemical, biochemical and biological decay leads to the formation of a number of chemical substances among which humic, and fulvic acids and their salts, cellulose, lignite, bitumens, peptides, enzymes and fats are the most common (Szajdak et al.
Fulvic acid oxidation state detection using fluorescence spectroscopy.
Glass transition behavior in a peat humic acid and in an aquatic fulvic acid.
Dixon AM, Mai MA, Larive CK: NMR investigation of the interactions between 4'-fluoro-1'-acetonaphthone and the Suwannee river fulvic acid, Env Sci & Tech, 33: 958-964, 1999.
It took 8-10 one-hour treatments with NaOH before the solutions appeared clear; we then did three additional extractions to ensure complete removal of the humic and fulvic acid components.
They also add manganese oxides and fulvic acid, a common humic compound, to water from the Gulf of Mexico, which contained a low concentration of humics.
Fulvic acid is really rich in minerals and nutrients.
Hansen EH, Schnitzer M (1969) Zn-dust distillation and fusion of a soil humic and fulvic acid.