Alfred O.C. Nier 1911-1994 Electron Impact (Nier-type) Thermal - PowerPoint PPT Presentation

Nov 25, 2022 •166 likes •322 views

Alfred O.C. Nier 1911-1994 Electron Impact (Nier-type) Thermal Ionization Plasma Ion Source Microwave Plasma source Secondary Ionization Sputter Ionization Source Matrix-assisted Laser Desorption and Ionization (MALDI) Electrospray

Alfred O.C. Nier 1911-1994
Electron Impact (Nier-type)
Thermal Ionization
Plasma Ion Source
Microwave Plasma source
Secondary Ionization
Sputter Ionization Source
Matrix-assisted Laser Desorption and Ionization (MALDI)
Electrospray Ionization
Relative pros and cons of different ionization techniques Ionization type Efficiency Selectivity Fragmentation Stability Electron impact + + + + Thermal ionization + - - ++ RF Plasma - +++ ++ - Sputter +++ ++ + - MALDI ++ -- - + Electrospray - - -- - Resonant +++ --- - + photoionization
Electron Energy
Open versus Tight sources
Pushing versus Pulling
Electrostatic lens

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