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ISO 21438-1:2022

Workplace atmospheres — Determination of inorganic acids by ion chromatography — Part 1: Non-volatile acids (sulfuric acid and phosphoric acid)

May 24, 2022

General information

60.60     May 24, 2022

ISO

ISO/TC 146/SC 2

International Standard

13.040.30  

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Scope

This document 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. The anions are detected by conductivity.
The method is applicable to the personal sampling of airborne particles, as defined in ISO 7708, and to static (area) sampling.
The method does not apply to the determination of sulfur trioxide.
The procedure does not differentiate between the acids and their corresponding salts if both are present in the workplace air.
The procedure does not differentiate between phosphoric acid and diphosphorus pentoxide (phosphoric anhydride) if both are present in the workplace air.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 21438-1:2007

NOW

PUBLISHED
ISO 21438-1:2022
60.60 Standard published
May 24, 2022