Chemical fractionation-enhanced structural characterization of marine dissolved organic matter
Abstract
Describing the molecular fingerprint of dissolved organic matter (DOM) requires sample processing methods and separation techniques that can adequately minimize its complexity. We have employed acid hydrolysis as a way to make the subcomponents of marine solid phase-extracted (PPL) DOM more accessible to analytical techniques. Using a combination of NMR and chemical derivatization or reduction analyzed by comprehensive (GCxGC) gas chromatography, we observed chemical features strikingly similar to terrestrial DOM. In particular, we observed reduced alicylic hydrocarbons believed to be the backbone of previously identified carboxylic rich alicyclic material (CRAM). Additionally, we found carbohydrates, amino acids and small lipids and acids.
- Publication:
-
American Geophysical Union, Ocean Sciences Meeting
- Pub Date:
- February 2016
- Bibcode:
- 2016AGUOSCT51A..04A
- Keywords:
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- 4805 Biogeochemical cycles;
- processes;
- and modeling;
- OCEANOGRAPHY: BIOLOGICAL AND CHEMICALDE: 4825 Geochemistry;
- OCEANOGRAPHY: BIOLOGICAL AND CHEMICALDE: 4840 Microbiology and microbial ecology;
- OCEANOGRAPHY: BIOLOGICAL AND CHEMICALDE: 4850 Marine organic chemistry;
- OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL