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In this session, the fundamentals of electron ionization (EI) for GC-MS is presented. The session will consider topics such as the anatomy of a typical EI source, the mechanisms of ionization, fragmentation and rearrangement reactions, and an introduction to EI mass spectral interpretation. A must see for everyone using or developing methods for GC-MS.


Topics include:

  • Why use electron ionization (EI)
  • Anatomy of a typical EI source
  • Vacuum and analyte introduction
  • Creation of radical cations
  • Energy of ionizing electrons
  • Transporting ions to the mass analyzer
  • Analyte fragmentation and rearrangement reactions
  • Tuning, troubleshooting & maintenance
  • Simple tools for EI interpretation