Method of detecting carbon dioxide gas, element for...

Details Method of detecting carbon dioxide gas, element for... Method of detecting carbon dioxide gas, element for...

G - Physics

01

N

150/6, 324/25.5

G01N 27/04 (2006.01) G01N 27/12 (2006.01) G01N 33/00 (2006.01)

Patent

CA 1256358

ABSTRACT The presence of carbon dioxide contained in a gas can be detected through measurement of the change in the electrical resistance of a hydroxyapatite in contact with carbon dioxide gas. The sensitivity of the hydroxy- apatite to carbon dioxide gas can be enhanced by the formation of a composite of the hydroxyapatite with an inorganic carbonate, e.g., sodium carbonate or calcium carbonate. The sensitivity to carbon dioxide gas can be further enhanced by the formation of a composite of the hydroxyapatite with an inorganic halide, e.g., calcium chloride.

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