This research was supported by a grant from the Trust for Mutual Understanding awarded to R. G. M. S. This work was additionally partially supported by NSF grants ANT-1203885 and PLR-1500169 to R. G. M. S. and FASE Russia under the theme “Complex research of biotic and abiotic components of water ecosystems in the catchment area of the White and southeast of the Barents Sea.” FT-ICR MS was partially supported by NSF Division of Chemistry and Division of Materials Research (DMR- 1157490), State of Florida, and the FSU Future Fuels Institute. The authors thank Donald F. Smith and all of the other people in the NHMFL ICR Program that work selflessly to facilitate data acquisition and processing for users of the facility. F. G. was partly supported by a postdoctoral fellowship from the Fond de Recherche du Québec - Nature et Technologies.
All software used for data processing are publicaly available:
https://nationalmaglab.org/user-facilities/icr/icr-software
