Articles | Volume 8, issue 10
https://doi.org/10.5194/amt-8-4075-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/amt-8-4075-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
06 Oct 2015
Research article |
| 06 Oct 2015
H2S interference on CO2 isotopic measurements using a Picarro G1101-i cavity ring-down spectrometer
K. Malowany
CORRESPONDING AUTHOR
Department of Earth & Planetary Sciences, McGill University, Montreal, Canada
J. Stix
Department of Earth & Planetary Sciences, McGill University, Montreal, Canada
A. Van Pelt
Picarro Inc., Santa Clara, CA, USA
G. Lucic
Department of Earth & Planetary Sciences, McGill University, Montreal, Canada
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Latest update: 17 Nov 2024
Short summary
Portable cavity ring-down spectrometers (e.g. G1101-i) for isotopic CO2 have an interference with elevated (higher than ambient) amounts of hydrogen sulfide (H2S). This results from the overlap of the H2S and CO2 spectral lines in the near-infrared, causing changes in both the 12CO2 and 13CO2 concentrations. This effect can be removed by reacting H2S with a metal scrub before analysis, which will facilitate the application of these instruments in H2S-rich environments (i.e. active volcanoes).
Portable cavity ring-down spectrometers (e.g. G1101-i) for isotopic CO2 have an interference...
