Sulfur dioxide detector

Details Sulfur dioxide detector Sulfur dioxide detector

1980-03-10

1981-07-07

Gron, Teddy S.

Compositions

Nonreactive analytical, testing, or indicating compositions

23230R, 23230L, 23232R, G01N 2106, G01N 2112, C09K 300

Patent

active

042773687

ABSTRACT:
A composition is provided for detecting the presence of sulfur dioxide by changing color. One type of composition is prepared by mixing a small amount of finely ground potassium permanganate with finely powdered activated silica gel to produce a lilac colored material which will turn white in the presence of sulfur dioxide. Another type of composition is prepared by soaking silica gel in an aqueous solution of potassium permanganate to produce an amber colored material which will turn white in the presence of sulfur dioxide. Both types of detecting material can be combined with silicone rubber and molded into various shapes.

REFERENCES:
patent: 2487077 (1949-11-01), Shepherd
patent: 2785959 (1957-03-01), Patterso et al.
patent: 2855280 (1958-10-01), McConnauchey
patent: 2949345 (1960-08-01), Clauss
patent: 2953441 (1960-09-01), Clauss
patent: 3528780 (1970-09-01), Radawski
patent: 3672842 (1972-06-01), Florin
patent: 3681027 (1972-08-01), Smith
patent: 4222745 (1980-09-01), Cloyd
Patterson, Jr., C. D., et al.; Annal. Chem., vol. 24, No. 10, pp. 1586-1590 Oct. 1952).

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