Abstract
The method for the determination of dissolved methane in water using the system based on a tubular selective membrane permeable to volatile organic substances and impermeable to liquid water is proposed. Purified air is passed through the membrane tube immersed in water. The air inside the tube is saturated with methane dissolved in water, which diffuses through the tube wall. Methane concentration is measured in the air passing through the membrane tube using a semiconductor metal oxide sensor. The sensitivity threshold and the response time of the system are estimated.
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Funding
This work was supported in part by the Ministry of Science and Higher Education of the Russian Federation within the framework of the State Assignment of the Federal Research Center “Crystallography and Photonics” of the Russian Academy of Sciences. The experiments were carried out using the equipment of the Center for Collective Use of the Federal Research Center “Crystallography and Photonics”. The work was financially supported in part by the Ministry of Science and Higher Education of the Russian Federation, Contract FFSM-2021-0006.
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Yablokov, M.Y., Vasiliev, A.A., Gainutdinov, R.V. et al. Determination of Methane Dissolved in Water Using Metal-Oxide Sensors. J Anal Chem 78, 385–389 (2023). https://doi.org/10.1134/S1061934823020156
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DOI: https://doi.org/10.1134/S1061934823020156