# ISO 21438-3:2010 — Withdrawn and superseded ISO standards

For ISO 21438-3:2010, item title is Workplace atmospheres — Determination of inorganic acids by ion chromatography — Part 3: Hydrofluoric acid and particulate fluorides; status code is 9599; successor is ISO 21438-3:2026; withdrawn / published date is 2010-07-30, recorded from its source on 2026-08-05.

- **Identifier:** ISO 21438-3:2010 _(verified: appears in the quote below)_
- **Item title:** Workplace atmospheres — Determination of inorganic acids by ion chromatography — Part 3: Hydrofluoric acid and particulate fluorides _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 21438-3:2026
- **Withdrawn / published date:** 2010-07-30 _(verified: appears in the quote below)_

## What the source says

> 45768,IS,,ISO 21438-3:2010,Workplace atmospheres — Determination of inorganic acids by ion chromatography — Part 3: Hydrofluoric acid and particulate fluorides,Air des lieux de travail — Détermination des acides inorganiques par chromatographie ionique — Partie 3: Acide fluorhydrique et fluorures particulaires,2010-07-30,1,['13.040.30'],ISO/TC 146/SC 2,9599,,[85691],"['en','fr']",29,"<p>ISO 21438-3:2010 specifies a method for the determination of the time-weighted average mass concentration of soluble particulate fluorides and hydrofluoric acid (HF) in workplace air by collection of the particulate fluorides on a pre-filter and HF on an alkali-impregnated filter and analysis by ion chromatog

## 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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).