1. Organic Matter Preservation In Marine Environments: Insights From A Study Of Marine Dissolved Organic Matter (DOM) Composition, Age And Source.
R. de Jesus and L. I. Aluwihare
Associated lipids and two sugar fractions released by acid hydrolysis of a DOM fraction are of marine origin in the estuary. However, the glucose-rich carbohydrate fraction (potentially derived from cellulose) appears to be primarily of terrestrial/river origin even in the estuary. This is the first demonstration that glucose in marine environments may be derived from an allocthonous source.
Solid Phase Extract
Fraction B
d13C = -23.3
D14C = -45.4
1H NMR Spectra and Carbon Isotope Signatures of a Subset of Dissolved Organic Matter (DOM) Isolated From the Delaware Estuary By Solid Phase Extraction
Solvent peak
Trifluoroacetic acid hydrolysis
Hydrolysed Lipid
d13C = -24.8
D14C = -97.5
Marine
aqueous
Ethyl acetate
Hydrolysed Polar
HPLC separation
S1 Glucose + Unknown
d13C = -23.3
D14C = -36.4
Terrestrial?
S2 Xylose+Rhamose+Galactose
d13C = -21.3
D14C = 48.1
Marine
S3 Fucose+Mannose+Arabinose
d13C = -20.4
D14C = 21
Marine