Account: Multiphoton ionization mass spectrometry: principles and fields of application

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Eur. J. Mass Spectrom. 2, 151 - 160 (1996)

Account: Multiphoton ionization mass spectrometry: principles and fields of application

Christian Weickhardt,^* Friedrich Moritz and Jürgen Grotemeyer
Institut für Physikalische Chemie, Universität Würzburg, Marcusstraße 911, .

ABSTRACT:

Multiphoton ionization exhibits a number of specific features that make it a unique ionization technique for analytical and scientific mass spectrometry. Among these is the possibility of selectively ionizing certain preselected compounds out of complex mixtures with high efficiency while supressing unwanted substances, a feature that can even be used to distinguish between isomers. Other interesting aspects include the ability to control the degree of fragmentation through the laser intensity and to ionize even large molecules intact especially when the ionization is induced by very short laser pulses. In this account the basic principles of the technique as well as the experimental requirements are discussed and some typical applications are demonstrated.

Keywords:

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