Spectral Gas Analysis and Reference Data

The working group is addressing the metrology and the application of molecular spectroscopy used to analyze gases and gas mixtures. Based on laser and Fourier-transform spectroscopy specific methods can be implementd to determine the amount-of-substance fraction (concentration) of a species under test in a given gas mixtures directly from the measured absorption of light. These methods rely on the knowledge of spectral line parameters describing the spectroscopic interaction quantitatively and specifically for the probed molecular transition.

Line parameters are key to many spectroscopic applications in atmospheric and environmental sciences as well as in industrial process control. The working group is therefore also devoted to the measurement and dissimation of spectral line parameters.

To summarize, the working group is devoted to the combination of gas metrology and molecular spectroscopy addressing the following R&D aspects:

• Applying IR spectroscopic techniques to quantify molecular species in gas mixtures

• Determining and disseminating spectral line parameters

• IR spectroscopy as a potential primary method in gas analysis

• Progressing spectroscopic measurement methods and sensors for metrology, atmospheric sciences and industry

• We are doing research on

• Development of a hygrometer to be used in airplanes for investigation of the
  atmosphere  (EUFAR)
  
  • (HAI)
  • (Publication)

• In-situ residual gas quantification with tunable diode laser absorption spectroscopy (FVV)
• Improving understanding of ice nucleation and growth inhibition mechanisms via new isotopic tracer studies in the AIDA aerosol chamber (DFG NSF)
• Spectroscopic analysis of high pressure and  high temperature processes (Publication)
  
  

• Completed projects within the scope of the European Metrology Research Programme (EMRP)

• EUMETRISPEC —› PTB internal continuation of the EMRP-Project (EUMETRISPEC)
• Metrology for airborne molecular contamination in manufacturing environments (MetAMC)
• Metrology for ammonia in ambient air (MetNH3)
• Metrology for high-impact greenhouse gases (HIGHGAS)
• Metrology for biogas (BIOGAS)
• Metrology to underpin future regulation of industrial emissions (IMPRESS)
  

 

• Projects within the scope of the European Metrology Programme for Innovation and Research EMPIR
  
  • Metrology for humidity at high temperature and transient conditions HIT
  • Metrology for Biogas 2 Biomethane
  • Metrology for nitrogen dioxide MetNO2
  • Metrology for stable isotope reference standards SIRS
  • Metrology for air pollutant emissions IMPRESS2
  • Metrology for Airborne Molecular Contaminations 2 MetAMC2

No current services

• Cooperation in international Committees

• EURAMET e. V. TC-MC Sub Commitee (Gas)
• CIPM CCQM GAWG (Working Group on Gas Analysis)

• PTB-Report CP8 to Workshop "Spectral Reference Line Data for Atmospheric Monitoring"

• Rückführbarkeit in der spektrometrischen Gasanalytik, 226. PTB-Seminar, 22. und 23. November 2006
• Technical protocol to EUROMET Projekt 934 “Gas metrology by calibration-free infrared laser-spectrometry as a potential primary method (Traceable IR laser-spectrometric amount fraction measurements, TILSAM)”
• BA-TILSAM as a result of iMERA-Plus Forschungsprojektes “Breath analysis”