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The Application of Resonant Multiphoton Ionization by Sub‐picosecond Laser Pulses for Analytical Laser Mass Spectrometry
Author(s) -
Weickhardt Christian,
Grun Carsten,
Heinicke Ralf,
Meffert Anja,
Grotemeyer Jürgen
Publication year - 1997
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/(sici)1097-0231(19970422)11:7<745::aid-rcm922>3.0.co;2-t
Subject(s) - chemistry , ionization , mass spectrometry , fragmentation (computing) , laser , picosecond , photoionization , excited state , atmospheric pressure laser ionization , molecule , mass spectrum , resonance enhanced multiphoton ionization , analytical chemistry (journal) , atomic physics , optics , ion , chromatography , organic chemistry , physics , computer science , operating system
Resonance‐enhanced multiphoton ionization (REMPI) offers a number of advantageous features for the analysis of complex mixtures, e.g. the ability to ionize preselected compounds and to control the degree of fragmentation, and, for a large number of substances, a high ionization efficiency. These features require that the excited molecular state(s) involved in the MPI process are not significantly depleted during the duration of the laser pulse. For several groups of environmentally important molecules, such as metal organic compounds, this is not the case. In this work it is demonstrated that, for a number of such molecules, the interesting features of REMPI for analysis can largely be regained, for quickly relaxing systems, by the application of ultra‐short laser pulses. © 1997 John Wiley & Sons, Ltd.