Berlin 2005 – scientific programme
Parts | Days | Selection | Search | Downloads | Help
UP: Umweltphysik
UP 8: Poster: Atmosph
ärische Spurengase und Aerosole: Laboruntersuchungen
UP 8.1: Poster
Tuesday, March 8, 2005, 10:15–12:15, Poster TU HTF
PTR-MS as a Technique for Investigating Stress Induced Emission of Biogenic VOCs — •Jonathan Beauchamp1, Armin Hansel1, Einhard Kleist2, Marco Miebach2, Uwe Weller2, Armin Wisthaler1, and Jürgen Wildt2 — 1Institut für Ionenphysik, Leopold-Franzens-Universität, A-6020 Innsbruck, Austria — 2Forschungszentrum Jülich, Institut Phytosphere (ICG-III), D-52425 Jülich, Germany
PTR-MS was used in conjunction with two GC-MS systems to investigate stress induced emissions of VOCs from plants. Experiments were performed in the laboratory under well defined conditions and VOC emissions were induced by ozone exposure at variable concentrations and for different durations. Tobacco (Nicotiana tabaccum cv. Bel W3) plants were used as the investigated species.
This investigation demonstrated the ability of PTR-MS to provide excellent high time-resolution on-line measurements of the relevant species. The combination of PTR-MS with GC-MS systems (enabling accurate compound identification) allowed for detailed investigation of the dynamics of the plants’ responses to ozone stress. VOCs measured included methanol, C6- alcohols and aldehydes, methyl salicylate and sesquiterpenes. Results indicate that the temporal stress response of plants depend on the amount of stress encountered by the plant.
Measurement technique and experimental results will be presented.