Measurement of vaporized h2o2 using near infrared...

Details Measurement of vaporized h2o2 using near infrared... Measurement of vaporized h2o2 using near infrared...

G - Physics

01

N

G01N 21/35 (2006.01) A61L 2/20 (2006.01)

Patent

CA 2176993

Measurements of concentrations of hydrogen peroxide vapor in the presence of water vapor is made using near infrared (NIR) spectroscopy with 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 H2O2 is transparent. The measurement process also may be incorporated into a control system assuring optimum hydrogen peroxide vapor concentrations for the sterilization procedure.

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