20.00 Sep 21, 2026
ISO
ISO/TC 146/SC 4
International Standard
This document specifies terms and definitions that are related to air quality (see 3.1.1.1). These are either general terms or are used in connection with the sampling (see 3.3.3.1) and measurement of gases, vapours (see 3.1.5.8) and airborne particles (see 3.2.2.1) for the determination of air quality.
The terms included are those that have been identified as being fundamental because their definition is necessary to avoid ambiguity and ensure consistency of use.
An alphabetical index of the terms is provided in Annex A.
This document is applicable to all International Standards, ISO Technical Reports, ISO Technical Specifications, and ISO Guides related to air quality.
PUBLISHED
ISO 4225:2020
PROJECT
ISO/AWI 4225
20.00
New project registered in TC/SC work programme
Sep 21, 2026