Applied physics

, Volume 7, Issue 4, pp 287–293 | Cite as

Infrared absorption spectroscopy of aqueous solutions with a CO2 laser

  • G. Kraus
  • Max Mater
Contributed Papers


We measured small concentrations of molecules and ions in aqueous solutions using a double-beam spectrometer with a CO2 laser as a light source. The detection sensitivity for inorganic anions, ethyl alcohol, and glucose is between 8 and 35 mg/l. The considerably improved performance of the laser spectrometer compared to a conventional infrared spectrometer is discussed. The sulphate concentration in the sewage of a textile plant was determined in good agreement with standard chemical methods. A distinct narrowing of the alcohol line at 9.56 μm by a factor of 3 was observed in dilute solutions of ethyl alcohol in water.

Index Headings

IR spectroscopy CO2 laser Aqueous solutions 


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Copyright information

© Springer-Verlag 1975

Authors and Affiliations

  • G. Kraus
    • 1
  • Max Mater
    • 2
  1. 1.Physik-Department der Technischen Universität MünchenMünchenFed. Rep Germany
  2. 2.Fachbereich Physik der Universität RegensburgRegensburgFed. Rep. Germany

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