TY  - GEN
A1  - Löhmannsröben, Hans-Gerd
A1  - Beitz, Toralf
A1  - Luadien, Robert
A1  - Schultze, Rainer
T1  - Laser-based ion mobility spectrometry for sensing  of aromatic compounds
N2  - The drift time spectra of polycyclic aromatic hydrocarbons (PAH), alkylbenzenes and alkylphenylethers were recorded with a laser-based ion mobility (IM) spectrometer. The ion mobilities of all compounds were determined in helium as drift gas. This allows the calculation of the diffusion cross sections (Omegacalc) on the basis of the exact hard sphere scattering model (EHSSM) and their comparison with the experimentally determined diffusion cross sections (Omegaexp). These Omegaexp/Omegacalc-correlations are presented for molecules with a rigid structure like PAH and prove the reliability of the theoretical model and experimental method. The increase of the selectivity of IM spectrometry is demonstrated using resonance enhanced multiphoton ionisation (REMPI) at atmospheric pressure, realized by tuneable lasers. The REMPI spectra of nine alkylbenzenes and alkylphenylethers are investigated. On the basis of these spectra, the complete qualitative distinction of eight compounds in a mixture is shown. These experiments are extended to alkylbenzene isomer mixtures.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - paper 003 
KW  - Laser
KW  - REMPI
KW  - Ion mobility spectrometry
KW  - PAH
Y1  - 2007
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/1111
UR  - https://nbn-resolving.org/urn:nbn:de:kobv:517-opus-11892
ER  -