Hannover 2010 – scientific programme
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MS: Fachverband Massenspektrometrie
MS 8: Poster
MS 8.16: Poster
Thursday, March 11, 2010, 16:00–18:00, Lichthof
Direct aqueous injection analysis of trace compounds in water with proton-transfer-reaction mass spectrometry (PTR-MS) — Simone Jürschik1, Philipp Sulzer1, Stefan Jaksch1, Stefan Haidacher1, Alfons Jordan1, Ralf Schottkowsky1, Eugen Hartungen1, Gernot Hanel1, Hans Seehauser1, •Lukas Märk1, 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
Here we report on a new instrumental development that allows for direct analysis of liquid samples. The direct aqueous injection (DAI) technique which we will present here turns out to be an ideal solution for direct analysis of liquid samples with PTR-MS. Water solutions were prepared with 1 to 1000 ppbw (part per billion weight) concentrations of methanol, acetonitrile, pyridine (in this case additional mixtures down to 125 pptw were prepared) and cyclohexanol in distilled water. We found that the detection of trace compounds in water is possible over several orders of magnitude down to a concentration level of about 100 pptw (for pyridine at protonated mass m/z = 80 and for about 5 min integration time) with great linearity, while only consuming about 100 ul of the sample. The response time of the setup is between 20 and 25 seconds. This method is applicable to the analysis of all substances and not limited by the permeability of a membrane. Therefore it will open completely new fields of application for the PTR-MS technique.