Sensitive detection of NH2 in shock tube experiments using frequency modulation spectroscopy

M. Votsmeier, S. Song, D. F. Davidson, R. K. Hanson

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


Frequency modulation detection of NH2 in shock tube experiments is demonstrated with sensitivities of 0.5 ppm in a single pass and 0.25 ppm in a double pass configuration. This corresponds to a minimum detectable absorption of 0.01% and 0.005%, respectively, which represents an improvement of more than a factor of 20 when compared to conventional laser absorption detection. The feasibility of the frequency modulation detection system for quantitative absolute concentration measurements is demonstrated using CH3NH2 as a precursor for the preparation of known NH2 concentrations.

Original languageEnglish
Pages (from-to)445-453
Number of pages9
JournalInternational Journal of Chemical Kinetics
Issue number6
Publication statusPublished - 1999

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry


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