Influence of the laser beam direction on the molecular ion ejection angle in matrix-assisted laser desorption/ionization
| Autor: | Roberto Rosas Pinho, Farouk Aksouh, Yvon Le Beyec, Serge Della-Negra, C. Deprun, John Hoyes, Pierre Chaurand |
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| Rok vydání: | 1995 |
| Předmět: |
Matrix-assisted laser desorption electrospray ionization
Chemistry Organic Chemistry Analytical chemistry Ion source Soft laser desorption Analytical Chemistry law.invention Atmospheric-pressure laser ionization Matrix-assisted laser desorption/ionization Reflectron law Ionization Atomic physics Spectroscopy Laser spray ionization |
| Zdroj: | Rapid Communications in Mass Spectrometry. 9:515-518 |
| ISSN: | 1097-0231 0951-4198 |
| DOI: | 10.1002/rcm.1290090609 |
| Popis: | Angular intensity distribution of molecular ions ejected in matrix-assisted laser desorption/ionization (MALDI) have been measured for two symmetrical positions of the laser beam with respect to the sample surface normal (+60° and −60°). It is shown that the molecular ions are ejected in the direction opposite to the incident laser beam with an average angle of ∼30° which does not depend on the molecular weight in the mass range m/z = 1000 to 25 000. Experiments were performed with the matrix α-cyano4-hydroxy-cinnamic acid. |
| Databáze: | OpenAIRE |
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