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INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 21438-2
ISO/TC 146/SC 2
Workplace atmospheres —
Secretariat: ANSI
Determination of inorganic acids by
Voting begins on:
2023-09-19 ion chromatography —
Voting terminates on:
Part 2:
2023-11-14
Volatile acids, except hydrofluoric acid
(hydrochloric acid, hydrobromic acid
and nitric acid)
Air des lieux de travail — Détermination des acides inorganiques par
chromatographie ionique —
Partie 2: Acides volatils, sauf acide fluorhydrique (acide
chlorhydrique, acide bromhydrique et acide nitrique)
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 21438-2:2023(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. © ISO 2023
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ISO/FDIS 21438-2:2023(E)
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 21438-2
ISO/TC 146/SC 2
Workplace atmospheres —
Secretariat: ANSI
Determination of inorganic acids by
Voting begins on:
ion chromatography —
Voting terminates on:
Part 2:
Volatile acids, except hydrofluoric acid
(hydrochloric acid, hydrobromic acid
and nitric acid)
Air des lieux de travail — Détermination des acides inorganiques par
chromatographie ionique —
Partie 2: Acides volatils, sauf acide fluorhydrique (acide
chlorhydrique, acide bromhydrique et acide nitrique)
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© ISO 2023
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or ISO’s member body in the country of the requester.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
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SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
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THEY ARE AWARE AND TO PROVIDE SUPPOR TING
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DOCUMENTATION.
Phone: +41 22 749 01 11
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: [email protected]
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 21438-2:2023(E)
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
ii
© ISO 2023 – All rights reserved
NATIONAL REGULATIONS. © ISO 2023
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ISO/FDIS 21438-2:2023(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 3
5 Requirement . 3
6 Reagents . 3
7 Apparatus .
...