Chemistry Experts

Charles N. Mcewen

Professor of Chemistry
Chemistry & Biochemistry
University of the Sciences
United States of America


Dr. McEwen holds a PhD from the University of Virginia.  The immediate goal of his research program is to develop new ionization methods and integrate them into commercial atmospheric pressure (AP) ion sources making them capable of nearly universal ionization.

Research Interest

Development of new and improved techniques in mass spectrometry, including atmospheric pressure ionization (API) and matrix-assisted laser desorption/ionization (MALDI), as applied to drug discovery, metabolomics and small molecule analysis.


  • Ionkin AS, Marshall WJ, Fish BM, Schiffhauer MF, Davidson F, McEwen CN. Highly Unsaturated Phosphorus Compounds: Generation and Reactions on Both Multiple Bonds of Vinyl Phosphaalkyne. Organometallics. 2009 Mar 26;28(8):2410-6.

  • Lloyd JA, Harron AF, McEwen CN. Combination atmospheric pressure solids analysis probe and desorption electrospray ionization mass spectrometry ion source. Analytical chemistry. 2009 Oct 6;81(21):9158-62.

  • Trimpin S, Inutan ED, Herath TN, McEwen CN. Matrix-assisted laser desorption/ionization mass spectrometry method for selectively producing either singly or multiply charged molecular ions. Analytical chemistry. 2009 Nov 11;82(1):11-5.

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