# ISO 11665-4:2020 — Withdrawn and superseded ISO standards

For ISO 11665-4:2020, item title is Measurement of radioactivity in the environment — Air: radon-222 — Part 4: Integrated measurement method for determining average activity concentration using passive sampling and delayed analysis; status code is 9599; successor is ISO 11665-4:2021; withdrawn / published date is 2020-01-06, recorded from its source on 2026-08-05.

- **Identifier:** ISO 11665-4:2020 _(verified: appears in the quote below)_
- **Item title:** Measurement of radioactivity in the environment — Air: radon-222 — Part 4: Integrated measurement method for determining average activity concentration using passive sampling and delayed analysis _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 11665-4:2021
- **Withdrawn / published date:** 2020-01-06 _(verified: appears in the quote below)_

## What the source says

> 76009,IS,,ISO 11665-4:2020,Measurement of radioactivity in the environment — Air: radon-222 — Part 4: Integrated measurement method for determining average activity concentration using passive sampling and delayed analysis,Mesurage de la radioactivité dans l'environnement — Air: radon 222 — Partie 4: Méthode de mesure intégrée pour la détermination de l'activité volumique moyenne du radon avec un prélèvement passif et une analyse en différé,2020-01-06,2,"['17.240','13.040.01']",ISO/TC 85/SC 2,9599,[52190],[82061],"['en','fr']",31,"<p>This document describes radon-222 integrated measurement techniques with passive sampling. It gives indications for determining the average activity concentrati

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).