DISPOSITIVO PER CONTROLLARE L'ESPO SIZIONE DI PERSONE AD ATMOSFERE CON TENENTI MONOSSIDO DI CARBONIO E MATERIALE DA IMPIEGARE IN ESSO

摘要

Colorimetric indicator material comprising alumina impregnated with permanganate ion and silver ion which changes color from purple to brown in the presence of carbon monoxide is disclosed. A personal monitor containing 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.