1. Department of Chemical and Materials Engineering, University of Alberta. Edmonton, AB T6G 1H9, Canada
2. Ion Cyclotron Resonance Program, National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, United States
3. International Joint Laboratory iC2MC: Complex Matrices Molecular Characterization, Total Research & Technology, Gonfreville, 76700 Harfleur France