Journal of the American Society for Mass Spectrometry

, Volume 21, Issue 6, pp 1037–1044

High resolution PTR-TOF: Quantification and formula confirmation of VOC in real time

Authors

  • Martin Graus
    • Institute of Ion Physics and Applied PhysicsUniversity of Innsbruck
    • Chemical Sciences DivisionNOAA Earth System Research, Laboratory
  • Markus Müller
    • Institute of Ion Physics and Applied PhysicsUniversity of Innsbruck
    • Ionicon Analytik
    • Institute of Ion Physics and Applied PhysicsUniversity of Innsbruck
Article

DOI: 10.1016/j.jasms.2010.02.006

Cite this article as:
Graus, M., Müller, M. & Hansel, A. J Am Soc Mass Spectrom (2010) 21: 1037. doi:10.1016/j.jasms.2010.02.006

Abstract

We present the unprecedented capability to identify and quantify volatile organic compounds (VOCs) by means of proton transfer reaction time-of-flight (PTR-TOF) mass spectrometry on-line with high time resolution. A mass resolving power of 4000–5000 and a mass accuracy of 2.5 ppm allow for the unambiguous sum-formula identification of hydrocarbons (HCs) and oxygenated VOCs (OVOCs). Test masses measured over an 11-wk period are very precise (SD < 3.4 ppm) and the mass resolving power shows good stability (SD < 5%). Based on a 1 min time resolution, we demonstrate a detection limit in the low pptv range featuring a dynamic range of six orders of magnitude. Sub-ppbv VOC concentrations are analyzed within a second; sub-pptv detection limits are achieved within a few tens of minutes. We present a thorough characterization of our recently developed PTR-TOF system and address application fields for the new instrument.

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Supplementary material

13361_2011_210601037_MOESM1_ESM.ppt (183 kb)
Supplementary material, approximately 188 KB.
13361_2011_210601037_MOESM2_ESM.ppt (109 kb)
Supplementary material, approximately 111 KB.
13361_2011_210601037_MOESM3_ESM.doc (44 kb)
Supplementary material, approximately 45 KB.
13361_2011_210601037_MOESM4_ESM.ppt (108 kb)
Supplementary material, approximately 110 KB.

Copyright information

© American Society for Mass Spectrometry 2010