Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 45,
  • Issue 2,
  • pp. 304-306
  • (1991)

Signal Enhancement by Using a Planar Laser Beam for Multiphoton Ionization in a Supersonic Jet/Reflectron Time-of-Flight Mass Spectrometer

Not Accessible

Your library or personal account may give you access

Abstract

Multiphoton ionization (MPI) mass spectrometry combined with supersonic jet spectroscopy (SJS) has been shown to be a very powerful method for chemical analysis. In this technique, sample molecules are generally introduced into a supersonic jet and carried into the ionization region of a time-of-flight mass spectrometer (TOFMS), where ions are produced through a resonant two-photon ionization (R2PI) process. Both an R2PI jetcooled spectrum and an MPI mass spectrum can be obtained. It has been demonstrated that the two-dimensional detection scheme based on the jet-cooled spectrum and the MPI mass spectrum can provide a unique means of molecular identification and structural analysis of organic and biological molecules with high sensitivity and selectivity. However, with the use of the supersonic jet, sample dilution and expansion along with the jet expansion of the carrier gas are unavoidable, which reduces the ultimate sensitivity of the SJS/MPI technique. Therefore, in order to increase the overall sensitivity of SJSfMPI mass spectrometry, the extent of the sample expansion should be reduced and a larger size of a laser beam should be used to ionize as large a proportion of molecules as possible.

PDF Article
More Like This
Ultrasensitive detection of atmospheric constituents by supersonic molecular beam, multiphoton ionization, mass spectroscopy

Jack A. Syage, James E. Pollard, and Ronald B. Cohen
Appl. Opt. 26(17) 3516-3520 (1987)

Development of a jet–REMPI (resonantly enhanced multiphoton ionization) continuous monitor for environmental applications

Harald Oser, Michael J. Coggiola, Gregory W. Faris, Steve E. Young, Bengt Volquardsen, and David R. Crosley
Appl. Opt. 40(6) 859-865 (2001)

Molecular analysis by ionization of laser-desorbed neutral species

Keith R. Lykke, Peter Wurz, Deborah H. Parker, and Michael J. Pellin
Appl. Opt. 32(6) 857-866 (1993)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved