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Comparison of Laser Mass Spectra Obtained at Ambient Conditions vs. Sample Freezing

  • J. J. Morelli
  • F. P. Novak
  • D. M. Hercules
Conference paper
Part of the Springer Series in Chemical Physics book series (CHEMICAL, volume 44)

Abstract

A significant advantage of laser mass spectrometry (LMS) is its capability to obtain spatial distributions of analytes within organic matrices [1–2]. Our interest in this area has focused on developing LMS for studying organic components within organic matrices. Many systems of interest contain volatile materials not readily suited to LMS analysis [3]. We have utilized two approaches to obtain LM spectra of volatile materials. The first approach uses a cold probe to freeze volatile organics, significantly reducing their vapor pressure. The second employs a thin formvar [poly(vinyl formal)] film as a seal between the sample and the instrument vacuum [3]. Formvar films employed in this manner allow laser mass analysis to be performed at atmospheric pressure; furthermore, no change in the physical state of the sample occurs when using these films. The potential advantage of using formvar lies in the ability to obtain LMS of liquids and solutions as in FAB, whereas, LMS analysis using the cold probe is performed with the samples in the solid state.

Keywords

Laser Energy Benzyl Alcohol Analyte Molecule Laser Power Density Volatile Material 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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    W.H. Schroder, G.C. Fain, Nature, 309, 268–270 (1984).ADSCrossRefGoogle Scholar
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    F.P. Novak, Z.A. Wilk, D.M. Hercules, J. Trace Microprobe Tech., 3, 149–163 (1985).Google Scholar
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    F.P. Novak, Z.A. Wilk, D.M. Hercules, J. Trace Microprobe Tech., 3, 149–163 (1985).Google Scholar
  4. 4.
    F.P. Novak, D.M. Hercules, unpublished results.Google Scholar
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    H.J. Heinen, S. Meir, H. Vogt, Int. J. Mass Spec. Ion Phys., 47, 19–22 (2983).CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1986

Authors and Affiliations

  • J. J. Morelli
    • 1
  • F. P. Novak
    • 1
  • D. M. Hercules
    • 1
  1. 1.Department of ChemistryUniversity of PittsburghPittsburghUSA

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