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Soil organic matter extraction using water at high temperature and elevated pressure (ASE) as compared to conventional methods

Title data

Schwesig, David ; Göttlein, Axel ; Haumaier, Ludwig ; Blasek, Roland ; Ilgen, Gunter:
Soil organic matter extraction using water at high temperature and elevated pressure (ASE) as compared to conventional methods.
In: International Journal of Environmental Analytical Chemistry. Vol. 73 (1999) Issue 4 . - pp. 253-268.
ISSN 1029-0397
DOI: https://doi.org/10.1080/03067319908032668

Abstract in another language

Large amounts of soil organic matter can be extracted when using salt solutions or organic solvents, but these extracts do not represent the organic matter soluble under natural conditions. The objective of our study was to evaluate the usefulness of water at high-temperature and elevated pressure for soil organic matter extraction. Soil samples were extracted with water at different temperatures under high pressure (10 MPa), using an Accelerated Solvent Extractor (ASE). These extracts were compared to extracts obtained by conventional methods using distilled water, NaOH and Na4P2O7 solutions. Yields of ASE extracts were up to twenty-fold higher than those of conventional water extracts. UV spectra as well as 1H and 13C NMR spectra revealed high similarity between conventional water extracts and ASE extracts up to 150°C. At higher temperatures, ASE extracts were enriched in aromatic and depleted in O-alkyl-C structures, strongly resembling the NaOH and Na4P2O7 extracts.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER7309
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 > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 22 Oct 2015 07:29
Last Modified: 22 Oct 2015 07:29
URI: https://eref.uni-bayreuth.de/id/eprint/20682