Non-linear photoelectron effect contributes to the formation of negative matrix ions in UV-MALDI

2016 ◽  
Vol 18 (29) ◽  
pp. 19574-19587 ◽  
Author(s):  
E. Alonso ◽  
R. Zenobi
Keyword(s):  
Electron Capture ◽  
Laser Desorption ◽  
Negative Ion ◽  
Laser Desorption Ionization ◽  
Desorption Ionization ◽  
Ion Formation ◽  
Positive Ions ◽  
Non Linear ◽  
Matrix Assisted Laser ◽  
Matrix Assisted Laser Desorption

The mechanism of negative ion formation in matrix-assisted laser desorption/ionization (MALDI) is less well understood than that of positive ions: electron capture, disproportionation, and liberation of negatively charged sample molecules or clusters have been proposed to produce the initial anions in MALDI.

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