Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing gas sample
Patent
1993-01-29
1996-07-02
Walsh, Donald P.
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Means for analyzing gas sample
422 8202, 422 8212, 422 94, 422 97, 436147, 436150, 436151, G01N 2700
Patent
active
H00015628
ABSTRACT:
The device of this invention is used to detect small quantities of liquid emical agents in certain pesticides on the basis of the heat reaction between the liquid agent and a chemical oxidant such as sodium or calcium hypochlorite. The detecting device consists of a thin film of resistance heat sensitive element on top of which porous or fibrous substrate material is mounted. This substrate is impregnated with the oxidant material. As a liquid agent contacts substrate it permeates through the substrate and reacts with the oxidant and generates heat. The output volume from the thin film resistance element increases correspondingly. The time from agent contact until this signal is observed as tested is less than one (1) second. The method is directed to the contacting of the liquid agent against the surface, wherein it permeates through the substrate and reacts with the oxidant and generates heat which change in heat is detected by the detecting device.
REFERENCES:
patent: 4125374 (1978-11-01), Bode et al.
patent: 4839700 (1989-06-01), Ramesham et al.
patent: 5003812 (1991-04-01), Yagawara et al.
Akers Charles K.
Albrechcinski Thomas M.
Carroll Chrisman D.
Goldberg Edward
Lane Anthony T.
Sachs Michael
The United States of America as represented by the Secretary of
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