Real-time passive detection of humidity using vanillin

Details Real-time passive detection of humidity using vanillin Real-time passive detection of humidity using vanillin

1990-06-18

1992-05-12

Hill, Jr., Robert J.

Chemistry: analytical and immunological testing

Determination of water

422 57, 422 8211, 422 87, 2524081, 252963, 116206, 73 232, 73 2901, 73 2904, 436169, 436902, G01N 3318

Patent

active

051127687

ABSTRACT:
A method and device involving use of the reaction product of an aldehyde acidified with sulfuric acid in acetone for sensing moisture. The reaction product is used as a coating for colorimetric detection of humidity, the color of the coating changing as a function of the humidity level. The coating is applied to a thin layer chromatography plate which is received in a badge housing to provide a real-time colorimetric dosimeter for monitoring humidity and indicating its presence.

REFERENCES:
patent: Re33064 (1989-09-01), Carter et al.
patent: 2728831 (1955-12-01), Pope
patent: 4681855 (1987-07-01), Huang
patent: 4732153 (1988-03-01), Phillips
patent: 4900681 (1990-02-01), Tuff et al.
patent: 4975249 (1990-12-01), Elliott
Kirk-Othmer, Encyclopedia of Chemical Technology, 2nd Ed, vol. 21 p. 192 (1970).
The Merck Index, 10th Edition, p. 1419, (1983).
Berni et al, Determination of water on Cotton . . . p. 1 (Oct. 1972).

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