Group of Molecular Ecology
|Olga Trubetskaya, Ph.D.||depart. email@example.com, |
|Valentina Sokolova||pr. lab. as.|
Identification of fluorophores in nanoparticles of dissolved organic matter from the Suwanee River (USA) (2018-11-26)
- (2018). Molecular Size Distribution of Fluorophores in Aquatic Natural Organic Matter: Application of HPSEC with Multi-Wavelength Absorption and Fluorescence Detection Following LPSEC-PAGE Fractionation. Environ Sci Technol 52 (9), 5287–5295
- (2018). Excitation-Dependent Fluorescence Quantum Yield for Freshwater Chromophoric Dissolved Organic Matter from Northern Russian Lakes. J Spectrosc (Hindawi) 2018,
3-D fluorescence spectra as a test system for evaluation the efficiency of humic substances preparative fractionation. (2017-11-28)
In recent years, three-dimensional fluorescence spectroscopy has been widely used to study complex heterogeneous mixtures, including natural humic substances, based on computer analysis of data obtained after removing several tens of emission spectra of the same sample at different excitation wavelengths of a given range. The set of data allows to obtain three-dimensional fluorescent diagrams with identification of all possible fluorescence maxima and their intensities. This method has been mastered and successfully used as a test system for evaluating the efficiency of fractionation of humic substances of various origin for the purpose of isolating and identifying individual fluorophores. The figure shows the three-dimensional fluorescent diagrams of the initial preparation of the dissolved organic matter and its fractions obtained by preparative exclusion chromatography. The three-dimensional fluorescent diagram allows not only to estimate the efficiency of fractionation, but also serve as a direct confirmation of the supramolecular organization of natural humic substances.Publications:Trubetskoi O.A., Trubetskaya O.E. Three-dimensional fluorescence analysis of chernozem humic acids and their electrophoretic fractions. Eurasian Soil Science (2017) 50:1018-1024. (Перевод: Почвоведение 2017, № 9, с.1057-1064). DOI:10.7868/S0032180X17090088Trubetskoi O.A., Trubetskaya O.E. Identification of fluorophores of organic matter of natural water. Water Resources (2017) Accepted for publication.