Detector tube

Details Detector tube Detector tube

1976-05-05

1977-05-10

Reese, Robert M.

Chemistry: physical processes

Physical processes

Crystallization

G01N 2112, G01N 3122

Patent

active

040225780

ABSTRACT:
A detector tube for detecting halogenated hydrocarbon compounds, preferably including first and second layers wherein the first layer comprises a carrier impregnated with hexavalent chromium and sulfuric acid to which is added an activator selected from the group consisting of 3-, 4-, and 5-valent compounds of nitrogen, 5- and 7-valent compounds of iodine and compounds of 4- and 6-valent selenium. A second layer for indicating the presence of a halogen or reaction product compound comprises a support material impregnated with a benzidine derivative, which may be positioned in a first tube with the first layer or in a second tube adapted for connection during detection with a first tube.

REFERENCES:
patent: 2487077 (1949-11-01), Shepherd
patent: 2593878 (1952-04-01), Haines et al.
patent: 2939768 (1960-06-01), Grosskopf
patent: 3355251 (1967-11-01), McConnaughey
patent: 3399973 (1968-09-01), Grosskopf
patent: 3437448 (1969-04-01), Miczka

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