Fluorescence and Electron Absorption Studies of the Structure of Humic Acids Extracted from the A Horizon of Soils
N. L. LAVRIK1, A. M. SAGDIEV2 and M. I. DERGACHEVA3
1Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences,
Ul. Institutskaya 3, Novosibirsk 630090 (Russia)
2Novosibirsk State University, Ul. Pirogova 2, Novosibirsk 630090 (Russia)
3Institute of Soil Science and Agrochemistry, Siberian Branch of the Russian Academy of Sciences,
Ul. Sovetskaya 18, Novosibirsk 630099 (Russia) E-mail: lavrik@ns.kinetics.nsc.ru
Pages: 437-442
Abstract
Fluorescence and electron absorption spectra have been recorded for humic acids (HA) extracted from different sampling depths R of the A horizon of black earth and saline land. It was established that the fluorescence bands red shifted and that the absorption intensity increased with R for both samples. It was concluded that the aromaticity of humic acid samples increases with R.
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