Applied Physics B

, Volume 64, Issue 6, pp 683–688 | Cite as

Detection of small traces of 15N2 and 14N2 by Faraday LMR spectroscopy of the corresponding isotopomers of nitric oxide

  • M. Koch
  • X. Luo
  • P. Mürtz
  • W. Urban
  • K. Mörike

15

N2 in a gas phase sample is described. The nitrogen is transformed by a microwave discharge into nitric oxide NO. The latter is analyzed by recording both a 15NO and a 14NO Faraday LMR signal. The determination of the transformation rate from N2 into NO is described. The method of measurement and the achieved sensitivity (∼0.1 ppm 15N2≈4 nanomoles 15N2/litergas) of the spectrometer are discussed. An application in pharmacology, where 15N is used as a tracer for metabolism is indicated. First experiments with the exhalation of a rat show that the apparatus is useful to give a new quality of results.

PACS: 07.57.Ty; 39.30.+w; 42.62.Be 

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Copyright information

© Springer-Verlag 1997

Authors and Affiliations

  • M. Koch
    • 1
  • X. Luo
    • 1
  • P. Mürtz
    • 1
  • W. Urban
    • 1
  • K. Mörike
    • 2
  1. 1.Institut für Angewandte Physik der Universität Bonn, Wegelerstr. 8, D-53115 Bonn, Germany (Fax: +49-228/733474, E-mail: petra@iap.uni-bonn.de)DE
  2. 2.Dr. Margarete Fischer-Bosch-Institut für Klinische Pharmakologie, Auerbachstr. 112, D-70376 Stuttgart, GermanyDE

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