People | Locations | Statistics |
---|---|---|
Ferrari, A. |
| |
Schimpf, Christian |
| |
Dunser, M. |
| |
Thomas, Eric |
| |
Gecse, Zoltan |
| |
Tsrunchev, Peter |
| |
Della Ricca, Giuseppe |
| |
Cios, Grzegorz |
| |
Hohlmann, Marcus |
| |
Dudarev, A. |
| |
Mascagna, V. |
| |
Santimaria, Marco |
| |
Poudyal, Nabin |
| |
Piozzi, Antonella |
| |
Mørtsell, Eva Anne |
| |
Jin, S. |
| |
Noel, Cédric |
| |
Fino, Paolo |
| |
Mailley, Pascal |
| |
Meyer, Ernst |
| |
Zhang, Qi |
| |
Pfattner, Raphael | Brussels |
|
Kooi, Bart J. |
| |
Babuji, Adara |
| |
Pauporte, Thierry |
|
Dittmar, T.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2019Analysis of deposited layers with deuterium and impurity elements on samples from the divertor of JET with ITER-like wallcitations
- 2015Novel insights into the molecular structure of non-volatile marine dissolved organic sulfur
- 2015Investigating the potential of solid-phase extraction and Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) for the isolation and identification of dissolved metal-organic complexes from natural waters
- 2015Illuminating the deep: Molecular signatures of photochemical alteration of dissolved organic matter from North Atlantic Deep Water
- 2015Evaluation of copper oxide oxidation for quantification of lignin in municipal solid waste
- 2015Bioavailability and molecular composition of dissolved organic matter from a diffuse hydrothermal system
- 2015Molecular characterization of dissolved black nitrogen via electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry
- 2014Automatic location of disruption times in JETcitations
- 2014Exo-Metabolome of Pseudovibrio sp FO-BEG1 Analyzed by Ultra-High Resolution Mass Spectrometry and the Effect of Phosphate Limitation
- 2013Latitude and pH driven trends in the molecular composition of DOM across a north south transect along the Yenisei River
- 2011Comparison of gas with liquid chromatography for the determination of benzenepolycarboxylic acids as molecular tracers of black carbon
Places of action
article
Novel insights into the molecular structure of non-volatile marine dissolved organic sulfur
Abstract
Abiotic sulfurization likely contributes to the preservation of organic matter in fossil deposits. It is unknown whether this mechanism also stabilizes dissolved organic matter (DOM) in the oceanic water column. Knowledge of the structure of the sulfur-containing compounds in DOM could help to understand the observed stability of at least a fraction of refractory DOM in the ocean. Structural analysis of dissolved organic sulfur (DOS) is complicated by it's great molecular diversity and the low concentration of each compound. Two contrasting marine DOM samples, one deep-sea sample from the North Pacific Ocean and one surface sample from the marginal North Sea (Germany), were examined in this study. Selective alteration experiments targeting different sulfur-containing functional groups were applied prior to Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR-MS). All treatments were also carried out with corresponding model compounds, in order to test for the applicability of the chosen reactions and for matrix effects, and to confirm the types of changes caused by the treatments. Alteration experiments were composed of harsh hydrolysis, selective derivatization of thiols, oxidation, and deoxygenation. None of these treatments induced detectable changes to DOS, indicating the absence of thioesters, sulfonic acid esters, alkylsulfates, thiols, non-aromatic thioethers, and sulfoxides in solid-phase-extractable DOM (SPE-DOM). Collision-induced fragmentation of isolated nominal masses in the FT-ICR-MS confirmed these findings and revealed the presence of sulfonic acids in both samples. Additionally, the presence of thiophenes and possibly also sulfones is likely, while the presence of any other form of sulfur in SPE-DOM can be ruled out based on our results. In conclusion, only unreactive (fully oxidized and hydrolyzed) sulfur compounds resist in the water column as part of refractory DOM. There was no detectable difference in molecular structure between DOS of the marginal North Sea and the deep ...