Chromatography

Ionization Modes

  EI

EI, one of the important ionization methods for GC/MS, will be explained. Additionally, you can experience the statistical aspect of mass analysis; the more ions you measure, the more improved data you obtain.

• Three Ionization Modes
• Features of EI
• Molecular Ion Produced by EI
• Fragment Ion Produced by EI
• Full View of EI
• Producing EI Mass Spectrum
• Electron Energy and Mass Spectrum

  PCI

PCI, one of the important ionization methods for GC/MS, will be explained. A comparison of reagent gas will also be provided.

• Three Ionization Modes
• Features of PCI
• Spectrum of PCI
• Appropriate Conditions of PCI
• Ionization Process of PCI
• Reactions Ionizing Sample Molecules
• Proton Affinity
• Comparison of Reagent Gasses

  NCI

NCI, one of the important ionization methods for GC/MS, will be explained..

• Three Ionization Modes
• Features of NCI
• Spectrum of NCI
• Ionization Process of NCI
• Molecular Peak and Fragmentation
• Negative ion Production Processes
• Useful Application Fields

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