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A comparative characterization of dissolved organic matter by means of original aqueous samples and isolated humic substances

Title data

Kalbitz, Karsten ; Geyer, Stefan ; Geyer, Wolfgang:
A comparative characterization of dissolved organic matter by means of original aqueous samples and isolated humic substances.
In: Chemosphere. Vol. 40 (2000) Issue 12 . - pp. 1305-1312.
ISSN 1879-1298
DOI: https://doi.org/10.1016/S0045-6535(99)00238-6

Abstract in another language

The aim of our study was to test the use of less time-consuming spectroscopic methods applied on original water samples in order to obtain information about DOM composition without any sample preparation. These results were directly compared with results from a conventional isolation and characterization procedure of dissolved humic substances (fulvic acids - FA) isolated from the same water sample. FAs were characterized by UV-, fluorescence-, FTIR spectroscopy and elemental composition. UV absorbance and fluorescence behaviour of FAs and original water samples follow the same pattern. A lower UV absorbance and a lower humification index (derived from the synchronous fluorescence spectra) of about 15% is typical for water samples compared to the FAs. We computed linear relationships between properties of the original water sample (UV-, synchronous fluorescence spectra) and the isolated FA (IR absorption, C/N ratio). The application of synchronous fluorescence and UV spectroscopy of aqueous samples has been proved to result in similar information about DOM composition as the characterization of isolated humic substances concerning the content of aromatic structures and the degree of humification.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER7347
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Soil Ecology
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 09 Oct 2015 05:56
Last Modified: 10 Jan 2018 09:20
URI: https://eref.uni-bayreuth.de/id/eprint/20284