Aero Laser - Model AL2021 - Continuous Hydrogen Peroxide H2O2 Analyzer for Air and Water Samples - Brochure

The detection of peroxides is based on the liquid phase reaction of peroxides with p-hydroxyphenylacetic acid catalyzed by peroxidase. This reaction produces a fluorescent dimer that can be excited at 326 nm and detected between 400 and 420 nm. The reaction is sensitive to all peroxides in the solution, but fastest for H₂O₂. To separate the signal of H₂O₂ from that of the other peroxides, two parallel channels are used. Behind the stripping coil, the solution is distributed to two channels, each having an own reactor and fluorimeter.