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Wiesheu, A.C.* ; Brejcha, R. ; Mueller, C.W.* ; Kögel-Knabner, I.* ; Elsner, M. ; Niessner, R.* ; Ivleva, N.P.*

Stable-isotope Raman microspectroscopy for the analysis of soil organic matter.

Anal. Bioanal. Chem. 410, 923–931 (2018)
DOI PMC
Open Access Green möglich sobald Postprint bei der ZB eingereicht worden ist.
We examined the potential of stable-isotope Raman microspectroscopy (SIRM) for the evaluation of differently enriched C-13-labeled humic acids as model substances for soil organic matter (SOM). The SOM itself can be linked to the soil water holding capacity. Therefore, artificial humic acids (HA) with known isotopic compositions were synthesized and analyzed by means of SIRM. By performing a pregraphitization, a suitable analysis method was developed to cope with the high fluorescence background. Results were verified against isotope ratio mass spectrometry (IRMS). The limit of quantification was 2.1 x 10(-1 13)C/C (tot) for the total region and 3.2 x 10(-2 13)C/C (tot) for a linear correlation up to 0.25 C-13/C (tot). Complementary nanoscale secondary ion mass spectrometry (NanoSIMS) analysis indicated small-scale heterogeneity within the dry sample material, even though-owing to sample topography and occurring matrix effects-obtained values deviated in magnitude from those of IRMS and SIRM. Our study shows that SIRM is well-suited for the analysis of stable isotope-labeled HA. This method requires no specific sample preparation and can provide information with a spatial resolution in the micrometer range.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Schlagwörter Raman Microspectroscopy ; Stable Isotopes ; Humic Acids ; Soil Organic Matter; Carbon Nanotubes; Humic Substances; Farmland Soils; Spectroscopy; Microbiology; Temperature; Phosphorus; Reduction; Colloids; Nanosims
Sprache englisch
Veröffentlichungsjahr 2018
Prepublished im Jahr 2017
HGF-Berichtsjahr 2017
ISSN (print) / ISBN 1618-2642
e-ISSN 1618-2650
Zeitschrift Analytical and Bioanalytical Chemistry
Quellenangaben Band: 410, Heft: 3, Seiten: 923–931 Artikelnummer: , Supplement: ,
Verlag Springer
Verlagsort Heidelberg
Begutachtungsstatus Peer reviewed
Institut(e) Institute of Groundwater Ecology (IGOE)
POF Topic(s) 20403 - Sustainable Water Management
Forschungsfeld(er) Environmental Sciences
PSP-Element(e) G-504300-002
G-504390-001
PubMed ID 28808741
DOI 10.1007/s00216-017-0543-z
WOS ID WOS:000422952600022
Scopus ID 85028554613
Erfassungsdatum 2017-09-18
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