Carbon monoxide monitoring system

G - Physics – 01 – N

Patent

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150/21

G01N 21/29 (2006.01) G01N 21/77 (2006.01) G01N 31/22 (2006.01) G01N 33/00 (2006.01)

Patent

CA 1135606

A B S T R A C T F.N. 915,003 Colorimetric indicator material comprising alumina impregnated with permanganate ion and silver ion which changed color from purple to brown in the presence of carbon monoxide is disclosed. A personal monitor con- taining permanganate ion and silver ion impregnated alumina which changes color completely when the carbon monoxide exposure over a given period of time exceeds a predetermined concentration is disclosed.

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