Device to indicate the concentration of ethylene oxide in the wo

Details Device to indicate the concentration of ethylene oxide in the wo Device to indicate the concentration of ethylene oxide in the wo

1983-08-15

1986-07-01

Turk, Arnold

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Calorimeter

422 87, 436 1, 436 93, G01N 2178

Patent

active

045979421

ABSTRACT:
A visual indicator device and dosimeter in which a liquid crystal composition deposited on an opaque dark-colored carrier substrate undergoes color changes which depend on the concentration, and total quantity, of ethylene oxide to which the device has been exposed. The device serves both to monitor the concentration of ethylene oxide in the environment and to indicate a time-weighted average exposure.

REFERENCES:
patent: 2998306 (1961-08-01), Huyck et al.
patent: 3258312 (1966-06-01), Olson
patent: 3409404 (1968-11-01), Fergason
patent: 3992154 (1976-11-01), Whitbourne et al.
patent: 4015937 (1977-04-01), Miyamoto et al.
patent: 4160008 (1979-07-01), Fenocketti et al.
patent: 4327575 (1982-05-01), Locker

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