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Erschienen in: Experiments in Fluids 9/2018

01.09.2018 | Research Article

A spectrophotometric method for measuring dissolved CO2 in saline water

verfasst von: Ying Teng, Pengfei Wang, Yu Liu, Lanlan Jiang, Dayong Wang

Erschienen in: Experiments in Fluids | Ausgabe 9/2018

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Abstract

The pH value of saline water decreases significantly with carbon dioxide (CO2) dissolution. The light absorbed by saline water containing an acid-base color indicator changes as a function of the dissolved CO2 concentration. For a bulk solution in a container with a certain thickness, light attenuation is proportional to solute concentration. Therefore, light attenuation can be used to quantify the dissolved CO2 concentration in water. We developed a spectrophotometric method for measuring the concentration of dissolved CO2 using an acid-base color indicator. An image processing charge-coupled device (CCD) camera was used to take images during the CO2 dissolution process. The gray value variation of the CCD camera images was combined with spectrophotometric analysis to determine the dissolved CO2 concentration.

Graphical abstract

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Metadaten
Titel
A spectrophotometric method for measuring dissolved CO2 in saline water
verfasst von
Ying Teng
Pengfei Wang
Yu Liu
Lanlan Jiang
Dayong Wang
Publikationsdatum
01.09.2018
Verlag
Springer Berlin Heidelberg
Erschienen in
Experiments in Fluids / Ausgabe 9/2018
Print ISSN: 0723-4864
Elektronische ISSN: 1432-1114
DOI
https://doi.org/10.1007/s00348-018-2594-0

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