(Table 1) Salinity and dissolved organic carbon concentration of marine water (ANT-XIX/2) and mangrove porewater (Brazil) ...

The chemical structure of refractory marine dissolved organic matter (DOM) is still largely unknown. Electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI FT-ICR-MS) was used to resolve the complex mixtures of DOM and provide valuable information on elemental compo...

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Bibliographic Details
Main Authors: Koch, Boris P, Witt, Matthias, Engbrodt, Ralph, Dittmar, Thorsten, Kattner, Gerhard
Format: Dataset
Language:English
Published: PANGAEA 2005
Subjects:
AWI
Event label
Date/Time of event
Latitude of event
Longitude of event
Station label
Sample type
DEPTH, water
Salinity
Carbon, organic, dissolved
Percentage
Water sample
CTD, Seabird
High temperature catalytic oxidation
ANT-XIX/2
Polarstern
Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158
Antarctic
Arctic
Weddell
Weddell Sea
Antarc*
Antarctica
Sea ice
Online Access:https://dx.doi.org/10.1594/pangaea.848469
https://doi.pangaea.de/10.1594/PANGAEA.848469
Description
Summary:The chemical structure of refractory marine dissolved organic matter (DOM) is still largely unknown. Electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI FT-ICR-MS) was used to resolve the complex mixtures of DOM and provide valuable information on elemental compositions on a molecular scale. We characterized and compared DOM from two sharply contrasting aquatic environments, algal-derived DOM from the Weddell Sea (Antarctica) and terrigenous DOM from pore water of a tropical mangrove area in northern Brazil. Several thousand molecular formulas in the mass range of 300-600 Da were identified and reproduced in element ratio plots. On the basis of molecular elemental composition and double-bond equivalents (DBE) we calculated an average composition for marine DOM. O/C ratios in the marine samples were lower (0.36 ± 0.01) than in the mangrove pore-water sample (0.42). A small proportion of chemical formulas with higher molecular mass in the marine samples were characterized ... : Supplement to: Koch, Boris P; Witt, Matthias; Engbrodt, Ralph; Dittmar, Thorsten; Kattner, Gerhard (2005): Molecular formulae of marine and terrigenous dissolved organic matter detected by electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry. Geochimica et Cosmochimica Acta, 69(13), 3299-3308 ...

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