# ISO 21438-1:2007 — Withdrawn and superseded ISO standards

For ISO 21438-1:2007, item title is Workplace atmospheres — Determination of inorganic acids by ion chromatography — Part 1: Non-volatile acids (sulfuric acid and phosphoric acid); status code is 9599; successor is ISO 21438-1:2022; withdrawn / published date is 2007-12-10, recorded from its source on 2026-08-05.

- **Identifier:** ISO 21438-1:2007 _(verified: appears in the quote below)_
- **Item title:** Workplace atmospheres — Determination of inorganic acids by ion chromatography — Part 1: Non-volatile acids (sulfuric acid and phosphoric acid) _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 21438-1:2022
- **Withdrawn / published date:** 2007-12-10 _(verified: appears in the quote below)_

## What the source says

> 40239,IS,,ISO 21438-1:2007,Workplace atmospheres — Determination of inorganic acids by ion chromatography — Part 1: Non-volatile acids (sulfuric acid and phosphoric acid),Air des lieux de travail — Détermination des acides inorganiques par chromatographie ionique — Partie 1: Acides non volatils (acide sulfurique et acide phosphorique),2007-12-10,1,['13.040.30'],ISO/TC 146/SC 2,9599,,[72921],"['en','fr']",29,"<p>ISO 21438-1:2007 specifies a method for the determination of the time-weighted average mass concentration of sulfuric acid and phosphoric acid in workplace air by ion chromatography.</p><p>The method is applicable to the personal sampling of the inhalable fraction of airborne particle

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).