Articles | Volume 18, issue 5
Technical note
09 Mar 2021
Technical note |  | 09 Mar 2021

Technical note: CO2 is not like CH4 – limits of and corrections to the headspace method to analyse pCO2 in fresh water

Matthias Koschorreck, Yves T. Prairie, Jihyeon Kim, and Rafael Marcé


Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
ED: Reconsider after major revisions (13 Nov 2020) by Peter Landschützer
AR by Matthias Koschorreck on behalf of the Authors (03 Jan 2021)  Author's response    Author's tracked changes    Manuscript
ED: Referee Nomination & Report Request started (14 Jan 2021) by Peter Landschützer
RR by Anonymous Referee #2 (25 Jan 2021)
RR by Matt Trentman (25 Jan 2021)
ED: Publish subject to technical corrections (27 Jan 2021) by Peter Landschützer
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.
Final-revised paper