Measurement of vaporized hydrogen peroxide

Details Measurement of vaporized hydrogen peroxide Measurement of vaporized hydrogen peroxide

1995-05-26

1997-02-04

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250343, G01N 2135

Patent

active

056001428

ABSTRACT:
On line and essentially continuous measurements of hydrogen peroxide vapor in the presence of water vapor can be made using near infrared (NIR) spectroscopy using fiber optic cables to transmit infrared radiation between, e.g, a sterilization chamber and the NIR instrument. Hydrogen peroxide absorbs selectively at about 1420 nm, where water vapor also absorbs, but the absorbance at 1420 nm can be corrected for water vapor measurements at remote wavelengths where H.sub.2 O.sub.2 is transparent. The measurement process also may be incorporated into a control system assuring optimum hydrogen peroxide vapor concentrations for the sterilization procedure.

REFERENCES:
patent: 4800279 (1989-01-01), Hieftje et al.
Davidson et al, "Precision of the Petrochemical Process Analysis Using N/R Spectroscopy", SPIE vol. 1681, Optically Based Methods for Process Analysis, 1992, pp. 231-235.
DiFoggio et al., "Near-Infrared Offers Benefits and Challenges in Gasoline Analysis", Oil and Gas Journal, May 1993, pp. 87-90.

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