What is ISO 4225 about?
ISO 4225 specifies terms and definitions that are related to air quality. These are either general terms or are used in connection with the sampling and measurement of gases, vapours and airborne particles for the determination of air quality.
The terms included in ISO 4225 are those that have been identified as being fundamental because their definition is necessary to avoid ambiguity and ensure consistency of use.
Note1: ISO 4225 is applicable to all International Standards, ISO Technical Reports, ISO Technical Specifications, and ISO Guides related to air quality.
Note2: The terms given in ISO 4225 are those in common use. The list should not be considered complete, however, and further terms will be added as the need arises.
Who is ISO 4225 for?
ISO 4225 on air quality- vocabulary is useful for:
- Agencies concerned with air quality
- Agencies concerned with sampling
- Laboratories concerned with air quality analysis
Why should you use ISO 4225?
Many terms that are commonly used in relation to air quality, sampling and measurement are defined within individual standards or technical documents and are often defined differently from one standard or document to the next. This creates ambiguities and inconsistencies in the use of such terms.
ISO 4225 helps you ensure that commonly used terms have agreed-upon definitions and to eliminate ambiguities and inconsistencies in their usage. It will be of benefit to agencies concerned with air quality, sampling, and laboratory analysis.
What’s changed since the last update?
This third edition BS ISO 4225:2020 replaces the second edition ISO 4225:1994, which has been technically revised. The main changes compared to the previous edition are as follows:
- Where appropriate, terms and definitions have been harmonized with ISO 18158:2016
- Obsolete terms have been removed
- References have been updated
