title: Preparation of mixtures of humidified air with CO, SO2, NO2, NH3, NH2CH3, Cl2, and HCl to measure respirator cartridge and canister service life.
abstract: Four systems have been fabricated to measure the effective service life of respirator cartridges and canisters. The four systems employ carbon monoxide, sulfur dioxide/nitrogen dioxide, ammonia/methylamine, and chlorine/hydrogen chloride as contaminants. Each system produces test concentrations in the low percentage range (typically 0.05 to 3.0%) at flow rates of 32 and 64 liters/min and at relative humidities between 20 and 95%. Suitable anlyzers have been provided to measure the downstream concentration from 1 to 500 ppm as a function of time. Holders have been designed to accommodate the wide size variation of commercially available cartridges and canisters.
mesh_terms: D000388:Air / Q000032:analysis*; D000588:Amines / Q000032:analysis; D000641:Ammonia / Q000032:analysis*; D002248:Carbon Monoxide / Q000032:analysis*; D002712:Chlorides / Q000032:analysis*; D004780:Environment, Controlled; D006813:Humidity; D006859:Hydrogen / Q000032:analysis*; D009585:Nitrogen Dioxide / Q000032:analysis*; D012212:Rheology / Q000295:instrumentation; D013458:Sulfur Dioxide / Q000032:analysis*; D013672:Technology; D012122:Ventilators, Mechanical
chemical_list: D000588:Amines; D002712:Chlorides; D013458:Sulfur Dioxide; D000641:Ammonia; D002248:Carbon Monoxide; D006859:Hydrogen; D009585:Nitrogen Dioxide