BS ISO 4225-2020 Air quality一General aspects – Vocabulary

BS ISO 4225-2020 Air quality一General aspects – Vocabulary. This document specifies terms and definitions that are related to air quality (see 3.LL1). 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. 2 Normative references There are no normative references in this document. 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — ISO Online browsing platform: available at http://www.iso.org/obp — I EC Electropedia: available at http://www.electropedia.org/ 3.1 General terms 3.1.1 Terms describing air quality 3.1.1.1 air quality features of the air which have an impact on humans (e.g., sarety ana neailhj ana,’or tne environment Note ito entry: Air quality is typically expressed in terms of the presence or absence oIair pollution (3.2.1.2) (e.g. emissions (1214) or conversions resulting from emissions, e.g., ozone), using one or more measurements. Note 2 to entry: The concept of air quality can be used in reference to ambient air (3.1.1.3), indoor air (3.1.1.5), or workplace air (3.1.1.7). 3.1.1.2 air quality standard specified attribute of the air intended to prevent or minimize impacts on humans (e.g. safety and health) and/or the environment Note ito entry: Air quality standards are frequently defined statistically by setting a limit to the concentration of an air pollutant (3.2.1.1) over a specified averaging time (3.1.1.9). Note 2 to entry: Air quality standards can have legal or advisory status in one or more jurisdictions.BS ISO 4225 pdf download.