Mass spectrometry

- Ion sources
Electron ionization:
Electrons beam produced from high applied voltage (several thousands)- impact samples carry out the ionization process.
M + fast(e) ------M+  + 2 e

Chemical ionization, Reactive reagents are introduced to electron impact sources,
Transfer proton, as well as electrons.
- Mass analyzer
 +ion traps:
+ Quadrupole
+ Magnetic field analyzer
- Tandem mass spectrometry: use from 2 analyzers in system.
+ use from 2 mass analyzers: one will detect precursor ions, and the other measure product ions.
- Detectors