A new approach for fast, simultaneous NO/NO2 analysis: Application of basic features of multiphoton-induced ionization and dissociation of NOx

A. Bornschlegl, R. Weishaeupl, U. Boesl

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

A new method of simultaneously recording NO and NO2 concentrations in complex gas mixtures is described. This method is based on resonance enhanced multiphoton ionization (REMPI), on time-of-flight mass analysis, and on monitoring the kinetic energy released upon dissociation of NO2. Its benefits are high speed and high flexibility. NO/NO 2 analysis can therefore be combined with the simultaneous monitoring of other components. For instance, NH3 is a compound of interest when studying the chemical reactions of NOx in catalytic converters of combustion engines. The spectroscopic excitation schemes used for this new method are discussed in detail. Its reliability has been demonstrated by performing measurements at an industrial motor test facility. This novel technique performs well in comparison with conventional NOx analysis using chemiluminescence detection. [Figure not available: see fulltext.].

Original languageEnglish
Pages (from-to)161-168
Number of pages8
JournalAnalytical and Bioanalytical Chemistry
Volume384
Issue number1
DOIs
StatePublished - Jan 2006

Keywords

  • Fast chemical analysis
  • Kinetic energy release
  • Laser mass spectrometry
  • NO analysis
  • Resonance enhanced multiphoton ionization

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