| Publications | | » | 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
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E. B. Kujawinski, M. A. Freitas, X. Zang, P. G. Hatcher, K. B. Green-Church, and R. B. Jones., The application of electrospray ionization mass spectrometry to the structural characterization of natural organic matter., Organic Geochemistry, 33: 171-180, 2002
This report describes the application of electrospray ionization (ESI) mass spectrometry to the structural characterization of soil organic material, a critical component of environmental processes and the global carbon cycle. Quadrupole time-of-flight (QqTOF) mass spectrometry provided a routine screening of aqueous ions in humic and fulvic acid mixtures and MS/MS capabilities for selected ions. Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry required longer analysis time but achieved resolving powers >80,000 and mass accuracies of <1 ppm, which allowed exact molecular formula determination for selected peaks. This technique represents a significant advance in the identification of compounds within humic substances. |
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