Laser Mass Spectrometry for Time-Resolved Multicomponent Analysis of Exhaust Gas

C. Welckhardt, U. Boesl, E. W. Schlag

Research output: Contribution to journalArticlepeer-review

75 Scopus citations


A new analytical method for the fast analysis of trace substances in gas mixtures has been developed incorporating a pulsed tunable laser system and a reflectron time-of-flight mass spectrometer. The technique is especially designed for the time-resolved detection of air pollutants in the exhaust gas of motor engines. The purpose of this new analytical method is to achieve high time resolution (<100 ms), high sensitivity (down to 1 ppm), high quantitative precision (10%), and applicability to most exhaust emission components. The main difficulties for the analysis arise from the large number of components which show very different and rapidly varying concentrations. For a preliminary list of 25 exhaust emission components, all essential prameters have been determined. First results obtained from a real exhaust gas sample are presented.

Original languageEnglish
Pages (from-to)1062-1069
Number of pages8
JournalAnalytical Chemistry
Issue number7
StatePublished - 1 Apr 1994


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