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Highly Sensitive Poisoning-Resistant Optical Carbon Dioxide Sensors for Environmental Monitoring

Eva Fritzsche, E; Gruber, P; Schutting, S; Fischer, JP; Strobl, M; Müller, JD; Borisov, SM; (2017) Highly Sensitive Poisoning-Resistant Optical Carbon Dioxide Sensors for Environmental Monitoring. Analytical Methods , 9 (1) pp. 55-65. 10.1039/C6AY02949C. Green open access

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Abstract

A new optical carbon dioxide sensor for environmental monitoring is presented. It combines a robust and long-term stable sensing material with a compact read-out device. The sensing material relies on a NIR pH indicator immobilized into ethyl cellulose along with a quaternary ammonium base. The perfluorinated polymer Hyflon AD 60 used as a protection layer significantly enhances the long-term and mechanical stability of the sensor foils, as well as the robustness against poisoning gases, e.g. hydrogen sulfide. The sensor can be stored under ambient conditions for more than six weeks, whereas sensors covered with silicone rubber deteriorate within one week under the same conditions. The complete sensor device is applicable after a three-point (re)calibration without a preconditioning step. The carbon dioxide production and consumption of the water plant Egeria densa was measured in the laboratory. Furthermore, results of profiling carbon dioxide measurements during a research cruise on the Baltic Sea at water depths up to 225 m are presented.

Type: Article
Title: Highly Sensitive Poisoning-Resistant Optical Carbon Dioxide Sensors for Environmental Monitoring
Open access status: An open access version is available from UCL Discovery
DOI: 10.1039/C6AY02949C
Publisher version: http://dx.doi.org/10.1039/C6AY02949C
Language: English
Additional information: This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (https://creativecommons.org/licenses/by/3.0/)
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Biochemical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/1532227
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