| 摘要 |
Chlorine and hydrogen sulfide contamination in a local atmosphere is removed by drafting a ventilation flow stream of the contaminated atmosphere over an activated carbon adsorber bed. Saturation of the adsorber bed by adsorbed contaminant occurs as a progressive front advancing along the flow stream direction. One or more chlorine and hydrogen sulfide sensitive monitors signal passage of the saturation front at designated bed depth points. Each monitor is exposed to a small air sample flow from the bed at the respectively designated point. Each sample flow is directed serially over two reactive paper filters: the first being impregnated with 0-toluidine to remove Cl2 and the second being in impregnated with lead acetate to remove H2S. Both filters respond to the respective compounds with a color change. Monitor construction and assembly places both filters side-by-side behind transparent chamber windows for manual observation of the color change without disassembly of the monitor unit.
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