Laser-induced breakdown spectroscopy in gases using ungated detection in combination with polarization filtering and online background correction

Johannes Kiefer, J W Troeger, T Seeger, A Leipertz, B Li, Z S Li, M Alden

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Quantitative and fast analysis of gas mixtures is an important task in the field of chemical, security and environmental analysis. In this paper we present a diagnostic approach based on laser-induced breakdown spectroscopy (LIBS). A polarization filter in the signal collection system enables sufficient suppression of elastically scattered light which otherwise reduces the dynamic range of the measurement. Running the detector with a doubled repetition rate as compared to the laser online background correction is obtained. Quantitative measurements of molecular air components in synthetic, ambient and expiration air are performed and demonstrate the potential of the method. The detection limits for elemental oxygen and hydrogen are in the order of 15 ppm and 10 ppm, respectively.
Original languageEnglish
Article number065303
Number of pages7
JournalMeasurement Science and Technology
Volume21
Issue number6
Early online date12 May 2010
DOIs
Publication statusPublished - 1 Jun 2010

Keywords

  • laser-induced breakdown spectroscopy
  • LIBS
  • plasma spectroscopy
  • gas diagnostics
  • quantitative detection
  • polarization filtering

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