# ISO 13164-4:2015 — Withdrawn and superseded ISO standards For ISO 13164-4:2015, item title is Water quality — Radon-222 — Part 4: Test method using two-phase liquid scintillation counting; status code is 9599; successor is ISO 13164-4:2023; withdrawn / published date is 2015-06-08, recorded from its source on 2026-08-05. - **Identifier:** ISO 13164-4:2015 _(verified: appears in the quote below)_ - **Item title:** Water quality — Radon-222 — Part 4: Test method using two-phase liquid scintillation counting _(verified: appears in the quote below)_ - **Status code:** 9599 _(verified: appears in the quote below)_ - **Successor:** ISO 13164-4:2023 - **Withdrawn / published date:** 2015-06-08 _(verified: appears in the quote below)_ ## What the source says > 62424,IS,,ISO 13164-4:2015,Water quality — Radon-222 — Part 4: Test method using two-phase liquid scintillation counting,Qualité de l'eau — Radon 222 — Partie 4: Méthode d'essai par comptage des scintillations en milieu liquide à deux phases,2015-06-08,1,"['17.240','13.060.60','13.280']",ISO/TC 147/SC 3,9599,,[83055],"['en','fr']",12,"
ISO 13164-4:2015 describes a test method for the determination of radon-222 (222Rn) activity concentration in non-saline waters by extraction and liquid scintillation counting.
The radon-222 activity concentrations, which can be measured by this test method utilizing currently available instruments, are at least above 0,5 Bq l−1 f ## 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 Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).