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Proceedings Paper

Application of resonance-enhanced multiphoton ionization time-of-flight mass spectrometry (REMPI-TOFMS) for on-line trace analysis of combustion and pyrolysis products in technical processes
Author(s): Ralf Zimmermann; H. J. Heger; R. Dorfner; A. A. Kettrup; Ulrich Boesl
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Paper Abstract

We present first applications of resonance-enhanced multiphoton ionization time-of-flight mass spectrometry (REMPI-TOFMS) for on-line monitoring of technical water incinerator flue gases and coffee roasting process off- gases. The results were obtained with a newly developed, mobile REMPI-TOFMS device. The combination of laser induced resonance-enhanced multiphoton ionization and time-of-flight mass spectrometry represents a highly selective as well as sensitive analytical technique, well suited for species selective real-time on-line monitoring of trace-products in of-gases from thermal processes or technical incinerators. The achievable sensitivities are in the ppb-range or better for aromatic compounds. The high selectivity is due to the combination of mass- and optical selectivity, the high sensitivity is caused by the high cross sections of resonance-enhanced two photon ionization with lasers. On- line monitoring of trace chemicals, formed during combustion- or pyrolysis-processes, is useful e.g. for feed back steering of combustion processes in order to minimize the formation of hazardous byproducts or for optimization of the economic efficiency of thermal production processes.

Paper Details

Date Published: 23 May 1997
PDF: 11 pages
Proc. SPIE 3108, Combustion Diagnostics, (23 May 1997); doi: 10.1117/12.274767
Show Author Affiliations
Ralf Zimmermann, Technische Univ. Muenchen and GSF-Forschungszentrum fuer Umwelt und Gesundheit (Germany)
H. J. Heger, GSF-Forschungszentrum fuer Umwelt und Gesundheit and Technische Univ. Muenchen (Germany)
R. Dorfner, GSF-Forschungszentrum fuer Umwelt und Gesundheit and Technische Univ. Muenchen (Germany)
A. A. Kettrup, Technische Univ. Muenchen and GSF-Forschungszentrum fuer Umwelt und Gesundheit (Germany)
Ulrich Boesl, Technische Univ. Muenchen (Germany)


Published in SPIE Proceedings Vol. 3108:
Combustion Diagnostics
Maurus Tacke; Winfried Stricker, Editor(s)

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