个人简介

Ph.D. (1981) Indiana University

研究领域

Bioanalytical/Environment and Energy

My research group focuses on the application of advanced analytical techniques, including ultrahigh resolution mass spectrometry, solid state 13C NMR spectroscopy and 3-D excitation-emission fluorescence spectroscopy, in studies of the organic chemistry of natural waters and sedi?ments. We are particularly interested in the composition, structure and biogeochemical reactivity of dissolved natural organic matter (DOM), including DOM containing nitrogen and phosphorus. In 1997, in collaboration with co-workers at the National High Magnetic Field Laboratory, we published the first description of the use of electrospray ionization and high-field FT-ICR mass spectrometry do characterize humic and fulvic acids (1), and we have been developing and refining this technique since that first paper appeared. The rapid evolution of FT-ICR MS for applications in the geosciences can be appreciated by comparing the relatively small number of compounds identified in that first manuscript (10) with the over 10,000 individual molecular formulas that are typically identified in a single spectrum today (2-4). Our current efforts are directed to correlating these ultrahigh resolution mass spectrometry measurements with other techniques such as 13C NMR and 3-D excitation-emission fluorescence spectroscopy to identify chemical and biochemical signatures of climate change (4-5).

近期论文

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Fievre, A., Solouki, T., Marshall, A.G., Cooper, W.T. "High Resolution Fourier Transform Ion Cyclotron Resonance Mass Spectrometry of Humic and Fulvic Acids by Laser Desorption/Ionization and Electrospray Ionization", Energy & Fuels, 11, 554-560, 1997. Podgorski, D.C., Hamdan, R., McKenna, A.M., Nyadong, L., Rodgers, R.P., Marshall, A.G., Cooper, W.T. "Characterization of Pyrogenic Black Carbon by Desorption Atmospheric Pressure Photoionization Fourier Transform Ion Cyclotron Resonance Mass Spectrometry??, Anal. Chem., 84, 1281-1287. 2012. Osborne, D.M., Podgorski, D.C., Bronk, D.A., Roberts, Q., Sipler, R.E., Austin, D., Bays, J.S., Cooper, W.T. "olecular-Level Characterization of Reactive and Refractory Dissolved Organic Nitrogen Compounds in a Nutrient-Impacted River", Rap. Comm. Mass Spectrom., 27, 1-8, 2013. Tfaily, M.M., Hamdan, R., Corbett, J.E., Chanton, J.P., Glaser, P.H., Cooper, W.T. "Investigating Dissolved Organic Matter Decomposition in Northern Peatlands using Complimentary Analytical Techniques", Geochim. Cosmochim. Acta, 112, 116?C129, 2013. Hamdan, R., El-Rifai, H.M., Cheesman, A.W., Turner, B.L., Reddy, K.R., Cooper, W.T. ??Linking Phosphorus Sequestration to Carbon Humification in Wetland Soils by 31P and 13C NMR Spectroscopy??, Environ. Sci. Technol. 46, 4775-4782, 2012.n