[Infrared spectroscopy of humic acids of solonchak and solonetz]
1995
Milojkovic, N. (Poljoprivredni fakultet, Novi Sad (Yugoslavia)) | Tancic, N. | Kostic, N. | Nesic, Lj.
The obtained IR (infrared) spectrum of humic acids of the examined soils (solonchak and solonetz) enabled to determine the basic radicals of atomic groups and types of bonds. The diagram indicates a double structure of macromolecules consisting of an aromatic nucleus and polymer chains. The statistical analyses of results indicate that the change of the intensity of absorption bands of individual groups is in narrow linear correlation with the chemical composition of humic acids. Humic acids of solonchak and solonetz soil show the greatest intensities of absorption bands at 1760-1840 cm** (-1). The degree of oxidation of humic acids of the examined soils, is indicating that the increase of the oxidation level, leads to breaking of hydrogen bonds and the decrease of content of -OH, -CH2-, and -CH3 groups.
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