90.93 Standard confirmed Jun 15, 2023
ISO
ISO/TC 146/SC 3 Ambient atmospheres
International Standard
13.040.20 Ambient atmospheres
The method specified is based on drawing continuously, at a constant flow rate, an air sample through a particle filter before it enters the chemiluminescence analyser. It then flows into a reaction chamber where it is mixed with an excess flow of ethylene. Ozone and ethylene react instantaneously to produce light in the visible region (maximum at about 400 nm). The emitted light intensity is proportional to the concentration of ozone in the air sample and is measured by a photomultiplier tube. Applies to determination of the mass concentration of ozone between 2 µg/m^3 and 10 mg/m^3 at the reference conditions.
PUBLISHED
ISO 10313:1993
90.93
Standard confirmed
Jun 15, 2023
PUBLISHED
ISO 10313:1993/Amd 1:2024