Amperometric sensor for carbon dioxide: design, characteristics, and perforance

Journal Article · Tue Mar 14 23:00:00 EST 1989 · Analytical Chemistry; (USA)

DOI:https://doi.org/10.1021/ac00181a016· OSTI ID:5209576

Evans, J; Pletcher, D; Warburton, P R.G. ^[1]; Gibbs, T K ^[2]

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1. The University, Southampton (Enland)
2. Neotronics, Ltd., Herts (England)

A new sensor for atmospheric carbon dioxide is described. It is an amperometric device based on a porous electrode in a three-electrode cell and the electrolyte is a copper diamine complex in aqueous potassium chloride. The platinum cathode, held at constant potential, is used to detect the formation of Cu{sup 2+} following the change in the pH of the solution when the sensor is exposed to an atmosphere containing carbon dioxide. The sensor described is designed to monitor carbon dioxide concentrations in the range 0-5%, although with some modifications, other ranges would be possible. The response to a change in the carbon dioxide content of the atmosphere is rapid (about 10s) while the monitored current is strongly (but nonlinearly) dependent on carbon dioxide concentration. Unlike other amperometric devices for carbon dioxide, there is no interference from oxygen although other acid gases would lead to an interfering response.

• OSTI ID: 5209576
• Journal Information: Analytical Chemistry; (USA), Journal Name: Analytical Chemistry; (USA) Vol. 61:6; ISSN 0003-2700; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
400400 -- Electrochemistry
AIR
AMPEROMETRY
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL ANALYSIS
DATA
DESIGN
ELECTRODES
EXPERIMENTAL DATA
FLUIDS
GASES
INFORMATION
INTERFERING ELEMENTS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
PH VALUE
QUANTITATIVE CHEMICAL ANALYSIS
QUANTITY RATIO
TITRATION