Fluorescence Spectroscopy Reveals Ubiquitous Presence of Oxidized and Reduced Quinones in Dissolved Organic Matter
Institute of Arctic and Alpine Research · University of Colorado Boulder
Abstract
Excitation-emission matrixes (EEMs) of 379 dissolved organic matter (DOM) samples from diverse aquatic environments were modeled by parallel factor analysis (PARAFAC). Thirteen components likely representing groups of similarly fluorescing moieties were found to explain the variation in this data set. Seven of the thirteen components were identified as quinone-like based on comparison of their excitation and emission spectra to spectra of model quinones. These quinone-like fluorophores were found to vary in redox state and degree of conjugation. Two components were identified as amino acid-like based on comparison to tyrosine and tryptophan fluorescence spectra. The other four components are not yet associated…
Citation impact
- FWCI
- 18.63
- Percentile
- 100%
- References
- 42
Authors
2Topics & keywords
- Quinone
- Fluorescence
- Redox
- Chemistry
- Photochemistry
- Fluorescence spectroscopy
- Moiety
- Dissolved organic carbon
- Life below water