INFLUENCE OF THE LASER-BEAM DIRECTION ON THE MOLECULAR ION EJECTION ANGLE IN MATRIX-ASSISTED LASER-DESORPTION IONIZATION

Authors
AKSOUH F CHAURAND P DEPRUN C DELLANEGRA S HOYES J LEBEYEC Y PINHO RR
Citation
F. Aksouh et al., INFLUENCE OF THE LASER-BEAM DIRECTION ON THE MOLECULAR ION EJECTION ANGLE IN MATRIX-ASSISTED LASER-DESORPTION IONIZATION, Rapid communications in mass spectrometry, 9(6), 1995, pp. 515-518
Citations number
8
Categorie Soggetti
Spectroscopy,"Chemistry Analytical
Journal title
Rapid communications in mass spectrometry → ACNP
ISSN journal
09514198
Volume
9
Issue
6
Year of publication
1995
Pages
515 - 518
Database
ISI
SICI code
0951-4198(1995)9:6<515:IOTLDO>2.0.ZU;2-X
Abstract
Angular intensity distribution of molecular ions ejected in matrix-ass isted laser desorption/ionization (MALDI) have been measured for two s ymmetrical positions of the laser beam with respect to the sample surf ace normal (+60 degrees and -60 degrees). It is shown that the molecul ar ions are ejected in the direction opposite to the incident laser be am with an average angle of similar to 30 degrees which does not depen d on the molecular weight in the mass range m/z = 1000 to 25 000. Expe riments were performed with the matrix alpha-cyano4-hydroxy-cinnamic a cid.