Composition, indicator, process and device for detecting carbon

Details Composition, indicator, process and device for detecting carbon Composition, indicator, process and device for detecting carbon

1983-09-22

1984-11-13

Schor, Kenneth M.

Chemistry: analytical and immunological testing

Oxygen containing

Inorganic carbon compounds

422 86, 422 87, 436167, 436178, 436902, 502217, G01N 2125, G01J 150

Patent

active

044826354

ABSTRACT:
There are disclosed an improved CO indicating composition consisting essentially of fumed silica having dispersed thereon dry residues of impregnation with a solution of palladium sulfate, sulfuric acid and ammonium molybdate, a CO indicator comprising a strip of a composite of expanded, amorphous-locked tetrafluoroethylene polymer and fumed silica having dried residues of impregnation with the aforesaid solution, an improved detector containing said indicating composition or said indicator, and improved process for detecting CO comprising exposing pre-dried air to the indicating composition or said indicator to effect a color change, extracting colored material with distilled water or an aqueous buffer solution, and measuring the depth of color in the resulting extract.

REFERENCES:
patent: 2487077 (1949-11-01), Shepherd
patent: 3245917 (1966-04-01), Mayo, Jr.
patent: 3507623 (1970-04-01), McConnaughey
patent: 3884641 (1975-05-01), Kraffczyk et al.
patent: 4043934 (1977-08-01), Shuler et al.
patent: 4096227 (1978-06-01), Gore
patent: 4208194 (1980-06-01), Nelson
patent: 4225464 (1980-09-01), Scholten et al.
patent: 4280929 (1981-07-01), Shaw et al.
patent: 4289709 (1981-09-01), Kaiser
Analytical Chemistry, vol. 19, No. 2; Feb. 1947; pp. 77-81; Shepherd.

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