Applied Physics B

, Volume 78, Issue 3, pp 513–517

Online monitoring of biogenic nitric oxide with a QC laser-based Faraday modulation technique

  • H. Ganser
  • M. Horstjann
  • C.V. Suschek
  • P. Hering
  • M. Mürtz
Article

DOI: 10.1007/s00340-003-1379-0

Cite this article as:
Ganser, H., Horstjann, M., Suschek, C. et al. Appl. Phys. B (2004) 78: 513. doi:10.1007/s00340-003-1379-0

Abstract

Online sensing of nitric oxide traces based on a cw quantum cascade laser, operating near 5.2 μm, is reported. We utilized a Faraday modulation technique which provides unique selectivity since it exploits the magnetic moment of nitric oxide (NO) molecules. The minimum detectable NO concentration was found to be 4 ppb (sampling time: 10 s). Continuous monitoring of the NO release from nitrite solutions and human sweat samples is described. Detectable NO release rates are down to 10 pmol/s. We compare NO generation induced by a chemical, and by exposure to ultra-violet radiation.

Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  • H. Ganser
    • 1
  • M. Horstjann
    • 1
  • C.V. Suschek
    • 2
  • P. Hering
    • 1
  • M. Mürtz
    • 1
  1. 1.Institut für LasermedizinUniversität DüsseldorfDüsseldorfGermany
  2. 2.Abteilung für ImmunbiologieUniversität DüsseldorfDüsseldorfGermany