Paramagnetic activity of organic matter in soils of the Ubsu-Nur Depression

Autor:	G. N. Kurochkina, F. I. Khakimov, V. G. Gaidalovich
Rok vydání:	2006
Předmět:	chemistry.chemical_classification Analytical chemistry Soil Science Spectral line Humus law.invention Paramagnetism chemistry law Absorption band Organic matter Electron paramagnetic resonance Radiant intensity Intensity (heat transfer) Earth-Surface Processes
Zdroj:	Eurasian Soil Science. 39:727-737
ISSN:	1556-195X 1064-2293
DOI:	10.1134/s1064229306070064
Popis:	The effect of the humus content and composition, the humification intensity, and the pH on the paramagnetic activity of organic matter in soils of vertical zones of the Ubsu-Nur Depression was revealed. It was found that the electron paramagnetic resonance (EPR) spectra of these soils have a relatively broad absorption band with the g factor equal to 2.0031 ± 0.0002; the EPR spectral curve has the form of the first derivative of the Gaussian absorption curve. The method of calculating the EPR spectral intensity was specified; regression equations were calculated for the pairs: the total carbon and the spectral intensity, the (HA + FA) carbon and the spectral intensity, and the Cha/Cfa ratio and the spectral intensity, which showed a correlation between the group composition of the humus and the EPR spectral intensity. The results obtained permitted us to separate the soils of the Ubsu-Nur Depression into three groups with high, medium, and low effects of the humus status parameters on the EPR spectrum intensity.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::30bfec8a04c839cd8f91d1626b127900 https://doi.org/10.1134/s1064229306070064 Zobrazit plný text záznamu Full text from SpringerLink