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
61.93 BHD
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
BH GSO 150-2:2015
GSO 150-2:2013
Bahraini Standard
Expiration dates for food products - Part 2 :
Voluntary expiration dates
BH GSO 2055-1:2016
GSO 2055-1:2015
Bahraini Technical Regulation
HALAL FOOD - Part 1 : General Requirements
GSO 2055-1:2015
Gulf Technical Regulation
HALAL FOOD - Part 1 : General Requirements
Recently Published
ISO 20589:2025
International Standard
Glass in building — Determination of the emissivity
ISO 11265:2025
International Standard
Environmental solid matrices — Determination of the specific electrical conductivity
ISO 11465:2025
International Standard
Sludge and solid environmental matrices — Determination of dry residue or water content and calculation of the dry matter fraction on a mass basis
ISO 9350:2025
International Standard
Corrosion of metals and alloys — Testing method of corrosion resistance for hafnium at high temperature and pressure