ISO 21438-1:2022
International Standard
Current Edition
·
Approved on
24 May 2022
Workplace atmospheres — Determination of inorganic acids by ion chromatography — Part 1: Non-volatile acids (sulfuric acid and phosphoric acid)
ISO 21438-1:2022 Files
English
22 Pages
Current Edition
63.15 OMR
ISO 21438-1:2022 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.
Best Sellers
GSO 150-2:2013
Gulf Standard
Expiration dates for food products - Part 2 :
Voluntary expiration dates
OS GSO 150-2:2013
GSO 150-2:2013
Omani Standard
Expiration dates for food products - Part 2 :
Voluntary expiration dates
OS GSO 2055-1:2015
GSO 2055-1:2015
Omani Standard
HALAL FOOD - Part 1 : General Requirements
GSO 2055-1:2015
Gulf Technical Regulation
HALAL FOOD - Part 1 : General Requirements
Recently Published
ISO 9241-171:2025
International Standard
Ergonomics of human-system interaction — Part 171: Software accessibility
ISO 21557:2025
International Standard
Mining — Mining methods — Classification and specification
ISO 8347:2025
International Standard
Measurement procedures associated with the chain of custody in native tropical forest management areas
ISO 37306:2025
International Standard
Liquid petroleum products — Determination of distillation characteristics at atmospheric pressure — Micro-distillation