Abstract.
A portable modular gas sensor for measuring the 13C/12C isotopic ratio in CO2 with a precision of 0.8‰(±1σ) was developed for volcanic gas emission studies. This sensor employed a difference frequency generation (DFG)-based spectroscopic source operating at 4.35 μm (∼2300 cm-1) in combination with a dual-chamber gas absorption cell. Direct absorption spectroscopy using this specially designed cell permitted rapid comparisons of isotopic ratios of a gas sample and a reference standard for appropriately selected CO2 absorption lines. Special attention was given to minimizing undesirable precision degrading effects, in particular temperature and pressure fluctuations.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
Author information
Authors and Affiliations
Additional information
Received: 16 April 2002 / Revised version: 28 May 2002 / Published online: 21 August 2002
RID="*"
ID="*"Corresponding author. Fax: +1-713/5245237, E-mail: fkt@rice.edu
Rights and permissions
About this article
Cite this article
Erdélyi, M., Richter, D. & Tittel, F. 13CO2/12CO2 isotopic ratio measurements using a difference frequency-based sensor operating at 4.35 μm. Appl Phys B 75, 289–295 (2002). https://doi.org/10.1007/s00340-002-0960-2
Issue Date:
DOI: https://doi.org/10.1007/s00340-002-0960-2