Woods Hole Oceanographic Institution

Elizabeth B Kujawinski Behn

»Using stable isotope probing to characterize differences between free-living and sediment-associated microorganisms in the subsurface.
»DOM in Lake Superior
»Deepwater Horizon hydrocarbons in the marine environment
»Microbes and marine DOM, Ann. Rev. Mar. Sci. 2011
»Greenland ice sheet outlet glacier: Insights from a new isotope-mixing model
»Groundwater DOM, GCA 2011
»Dispersants & DWH, ES&T 2011
»FT-MS variability in DOM, Org Geochem 2010
»Predatory Flavobacteria, FEMS Microb Ecol 2010
»Greenland Ice Sheet DOM, GCA 2010
»Protozoa and bacteria in aquifers, FEMS Microb Ecol, 2009
»Source markers in DOM, GCA 2009
»Automated data analysis, Anal. Chem. 2006
»Marine DOM and ESI FT-ICR MS; Marine Chem 2004
»DOM extraction by C18; Org. Geochem. 2003
»Black carbon by ESI FT-ICR MS; ES&T 2004
»ESI FT-ICR MS review; Env. Forensics 2002
»Marine protozoan surfactants; Marine Chem. 2002
»ESI MS and NOM; Org. Geochem. 2002
»ESI FT-ICR MS & humic acids; Anal. Chem. 2002
»Protozoan DOM & PCBs; ES&T 2001
»Protozoa & Fe, Th, C; Aquat. Microb. Ecol. 2001
»PCB uptake by protozoa; AEM 2000

E. B. Kujawinski, Electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI FT-ICR MS): Characterization of complex environmental mixtures, Environmental Forensics, 3: 207-216, 2002

Structural and chemical characterization of compounds within complex environmental mixtures provides unique insights into the roles of these compounds in different environmental processes. Here, an emerging technique in environmental chemistry, electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI FT-ICR MS), is described and its applications to the molecular characterization of humic acids and petroleum products are reviewed and examined. ESI is a low-fragmentation ionization technique that preferentially ionizes polar functional groups prior to mass spectrometric analysis. This technique allows the characterization of intact polar macromolecules that are inaccessible to standard chromatographic techniques. ICR MS is an ultrahigh resolution and mass accuracy MS technique based on the detection of ion cyclotron motion within a magnetic field. The combination of ESI FT-ICR MS with other structural techniques such as nuclear magnetic resonance (NMR) allows the unprecedented identification and characterization of polar macromolecules in environmental mixtures and will find numerous applications within environmental chemistry and forensics.

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