A deflection system to reduce the interference from post-source decay product ions in photodissociation tandem time-of-flight mass spectrometry.
A deflection system consisting of four deflectors was designed and used to reduce the interference from post-source decay (PSD) product ions in photodissociation (PD) tandem time-of-flight (TOF) mass spectrometry. For simple protonated peptides generated by matrix-assisted laser desorption/ionization, the presence of PSD product ions at the laser irradiation spot was found to noticeably alter the minor peaks in the PD spectra even though the major ones were hardly affected. Other benefits from the use of the deflection system such as the improvement in the resolving power in PSD tandem mass spectra are discussed.
Yoon
So Hee
SH
National Creative Research Initiative Center for Control of Reaction Dynamics and School of Chemistry, Seoul National University, Seoul 151-742, Korea.
Moon
Jeong Hee
JH
Choi
Kyung Mi
KM
Kim
Myung Soo
MS
D010449:Peptide Mapping; D010455:Peptides / Q000032:analysis / Q000737:chemistry*; D010777:Photochemistry / Q000379:methods*; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / Q000295:instrumentation* / Q000379:methods; D053719:Tandem Mass Spectrometry / Q000295:instrumentation* / Q000379:methods
D010455:Peptides