Hannover 2010 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 8: Poster
MS 8.14: Poster
Donnerstag, 11. März 2010, 16:00–18:00, Lichthof
Extremely high mass resolution and sensitivity - comparison of two novel proton transfer reaction time-of-flight mass spectrometers (PTR-TOFMS) — Alfons Jordan1, •Philipp Sulzer1, Simone Jürschik1, Stefan Jaksch1, Gernot Hanel1, Eugen Hartungen1, Hans Seehauser1, Lukas Märk1, Stefan Haidacher1, Ralf Schottkowsky1, and Tilmann Märk1,2 — 1IONICON Analytik GmbH, Technikerstr. 21a, 6020 Innsbruck, Austria — 2Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria
Since many years PTR-MS is a well established technique in trace gas analysis with its major advantages of having very short response times of below 100ms and outstanding detection limits in the single digit pptv region. However, the quadrupole mass filter based instruments used so far cannot separate isobaric compounds due to lack of mass resolution. To overcome this problem Ionicon developed the so called PTR-TOF 8000 instrument, which couples the well established PTR ionization technique with a high resolution time-of-flight (TOF) mass analyzer. In contrast to a quadrupole based PTR-MS where only one nominal mass at a time can be monitored, the PTR-TOF acquires whole mass spectra in split-seconds at a resolution of up to 8.000 m/Δm (FWHM). As there might be applications where an enormous mass resolution is not necessarily needed, but the sensitivity has to be as high as possible, we now developed an instrument (called PTR-TOF 2000) that performs with an enhanced sensitivity at the expense of a somewhat lower mass resolution.