Abstract
Infrared absorption spectroscopy is utilized to identify and measure different nitrogen oxide species in the output of air-fed ozone generators. The concentrations of nitrous oxide (N2O) and dinitrogen pentoxide (N2O5) were determined over a wide parameter range of modern high power medium-frequency ozone generators. With a typical ozonation dose of 1 mg ozone per liter of drinking water, less than 10 ug N2O and about 20 ug N205 are introduced into one liter of drinking water.

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