ISO 21438-2:2024
(Main)Workplace atmospheres — Determination of inorganic acids by ion chromatography — Part 2: Volatile acids, except hydrofluoric acid (hydrochloric acid, hydrobromic acid and nitric acid)
Workplace atmospheres — Determination of inorganic acids by ion chromatography — Part 2: Volatile acids, except hydrofluoric acid (hydrochloric acid, hydrobromic acid and nitric acid)
This document specifies a method for the determination of the time-weighted average mass concentration of hydrogen chloride (HCl) gas and hydrochloric acid mist, hydrogen bromide (HBr) vapour and hydrobromic acid mist and nitric acid (HNO3) vapour and mist in workplace air by collection on an alkali-impregnated quartz fibre filter and analysis by ion chromatography. For mist sampling, this method is applicable to the personal sampling of the inhalable fraction of airborne particles as defined in ISO 7708 and to static (area) sampling.
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)
Le présent document spécifie une méthode de détermination de la concentration massique moyenne pondérée dans le temps en chlorure d’hydrogène (HCl) gazeux et en brouillards d’acide chlorhydrique, en bromure d’hydrogène (HBr) gazeux et en brouillards d’acide bromhydrique et en vapeurs et brouillards d’acide nitrique (HNO3) dans l’air des lieux de travail, par prélèvement sur un filtre en fibres de quartz alcalin et analyse par chromatographie ionique. En cas de prélèvement de brouillard, cette méthode est applicable au prélèvement individuel de la fraction inhalable des particules en suspension dans l’air, comme défini dans l’ISO 7708, ainsi qu’au prélèvement à point fixe.
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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:
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
---------------------- Page: 1 ----------------------
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
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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or ISO’s member body in the country of the requester.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
ISO copyright office
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
CP 401 • Ch. de Blandonnet 8
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: copyright@iso.org
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
---------------------- Page: 2 ----------------------
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 .
...
ISO/FDIS 21438--2:2023(E)
ISO TC 146/SC 2 N1307
Secretariat: ANSI
Workplace atmospheres — Determination of inorganic acids by ion chromatography — Part 2:
Volatile acids, except hydrofluoric acid (hydrochloric acid, hydrobromic acid and nitric acid)
Second edition
Date: 2023-06-0809-04
---------------------- Page: 1 ----------------------
ISO/FDIS 21438-2:2023(E)
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of
this publication may be reproduced or utilized otherwise in any form or by any means, electronic or
mechanical, including photocopying, or posting on the internet or an intranet, without prior written
permission. Permission can be requested from either ISO at the address below or ISO’sISO's member body
in the country of the requester.
ISO Copyright Office
CP 401 • CH. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Email: copyright@iso.org copyright@iso.org
Website: www.iso.org
Published in Switzerland.
ii © ISO 2023 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/FDIS 21438-2:2023(E)
Contents
Foreword . 5
Introduction . 6
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Principle . 3
5 Requirement . 3
6 Reagents . 3
7 Apparatus . 4
7.1 Sampling equipment. 4
7.2 Laboratory apparatus . 6
8 Occupational exposure assessment . 7
9 Sampling . 7
9.1 Preliminary considerations . 7
9.1.1 Selection and use of samplers . 7
9.1.2 Sampling period . 7
9.1.3 Effect of temperature and pressure on flow rate measurements . 8
9.1.4 Sample handling . 8
9.2 Preparation for sampling . 9
9.2.1 Cleaning of samplers . 9
9.2.2 Loading the aerosol samplers with filters . 9
9.2.3 Setting the volumetric flow rate . 9
9.2.4 Field blanks . 10
9.3 Sampling position . 10
9.3.1 Personal sampling .
...
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