Fig. 1
From: Universal molecular structures in natural dissolved organic matter
FT-ICR mass spectra of DOM samples, broad band scans and fragmentation experiments. a Map of sampling sites53. b Most abundant fragment ions occurring in dissolved organic matter (DOM) fragmentation experiments as percentage of total intensity (named according to the corresponding neutral loss). c Full range mass spectra showing bell-shape intensity distribution of detected masses. d Detected ions with nominal mass m/z 381 zoomed in from full range mass spectra, exemplary for the six fragmented nominal masses. e Full fragmentation patterns of m/z 381, exemplarily. f Fragment ions resulting from neutral loss of CO2 and g from neutral loss of H2O, zoomed in from the respective mass range in full fragmentation pattern. Precursor ions are indicated by asterisks (*)
