Articles | Volume 18, issue 5
https://doi.org/10.5194/bg-18-1619-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-18-1619-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Technical note: CO2 is not like CH4 – limits of and corrections to the headspace method to analyse pCO2 in fresh water
Matthias Koschorreck
CORRESPONDING AUTHOR
Department Lake Research, Helmholtz Centre for Environmental Research – UFZ, Brückstrasse 3a, 39114 Magdeburg, Germany
Yves T. Prairie
Département des Sciences Biologiques, Université du
Québec à Montréal, Montréal, Quebec, Canada
Jihyeon Kim
Département des Sciences Biologiques, Université du
Québec à Montréal, Montréal, Quebec, Canada
Rafael Marcé
Catalan Institute for Water Research (ICRA), Emili Grahit 101, 17003 Girona, Spain
University of Girona, Girona, Spain
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Latest update: 20 Nov 2024
Short summary
The concentration of carbon dioxide (CO2) in water samples is often measured using a gas chromatograph. Depending on the chemical composition of the water, this method can produce wrong results. We quantified the possible error and how it depends on water composition and the analytical procedure. We propose a method to correct wrong results by additionally analysing alkalinity in the samples. We provide an easily usable computer code to perform the correction calculations.
The concentration of carbon dioxide (CO2) in water samples is often measured using a gas...
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