Time-delayed 2-pulse studies of MALDI matrix ionization mechanisms

Authors
Knochenmuss, R Vertes, A
Citation
R. Knochenmuss et A. Vertes, Time-delayed 2-pulse studies of MALDI matrix ionization mechanisms, J PHYS CH B, 104(23), 2000, pp. 5406-5410
Citations number
51
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
JOURNAL OF PHYSICAL CHEMISTRY B
ISSN journal
15206106 → ACNP
Volume
104
Issue
23
Year of publication
2000
Pages
5406 - 5410
Database
ISI
SICI code
1520-6106(20000615)104:23<5406:T2SOMM>2.0.ZU;2-U
Abstract
Individually subthreshold, time-delayed 355 nm laser pulses were used to in vestigate matrix-assisted laser desorption/ionization (MALDI) ion formation time scales for the matrix 2,5 dihydroxybenzoic acid. With 30 ps pulses, i t was possible to identify a prompt, subnanosecond, mechanism and a slow, n anosecond, process involving at least two steps.