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BS ISO 21438-2:2009

BS ISO 21438-2:2009

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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Workplace atmospheres. Determination of inorganic acids by ion chromatography Volatile acids, except hydrofluoric acid (hydrochloric acid, hydrobromic acid and nitric acid)

Available format(s)

Hardcopy , PDF

Superseded date

29-01-2024

Superseded by

BS ISO 21438-2:2024

Language(s)

English

Published date

31-01-2010

Publisher

British Standards Institution

£218.00
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Hardcopy - English
PDF - English
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Requirement
6 Reagents
7 Apparatus
8 Occupational exposure assessment
9 Sampling
10 Analysis
11 Expression of results
12 Method performance
13 Test report
Annex A (informative) - Temperature and pressure correction
Annex B (normative) - Filter materials
Bibliography

Describes 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 (HNO[3]) vapour and mist in workplace air by collection on an alkali-impregnated quartz fibre filter and analysis by ion chromatography.

Committee
EH/2/2
DocumentType
Standard
Pages
40
PublisherName
British Standards Institution
Status
Superseded
SupersededBy

This part of ISO21438 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, the method is applicable to the personal sampling of the inhalable fraction of airborne particles, as defined in ISO7708, and to static (area) sampling.

The analytical method is applicable to the determination of masses of 0,01mg to 2,5mg of HCl, HBr and HNO3 per sample.

The range of concentrations of HCl, HBr and HNO3 in air for which the measuring procedure is applicable is determined by the sampling method selected by the user. For a 240l air sample, the working range is approximately 0,04mg·m−3 to 10mg·m−3 for HCl, HBr and HNO3.

The procedure is intended to differentiate between the acids and their corresponding salts. If both are present in the air, particulate salts are trapped on a pre-filter. Co-sampled particulate matter trapped on the pre-filter and/or deposited on the walls of the sampler may be analysed, if desired.

Acids can react with co-sampled particulate matter on the pre-filter, causing interference with the measurement of the acid concentration.

Standards Relationship
ISO 21438-2:2009 Identical

ASTM E 1370 : 2014 : REDLINE Standard Guide for Air Sampling Strategies for Worker and Workplace Protection
EN 12919:1999 Workplace atmospheres - Pumps for the sampling of chemical agents with a volume flow rate of over 5 l/min - Requirements and test methods
ASTM D 4840 : 1999 Standard Guide for Sampling Chain-of-Custody Procedures
ISO 7708:1995 Air quality — Particle size fraction definitions for health-related sampling
ISO 8655-1:2002 Piston-operated volumetric apparatus Part 1: Terminology, general requirements and user recommendations
ISO 3585:1998 Borosilicate glass 3.3 — Properties
ISO 8756:1994 Air quality Handling of temperature, pressure and humidity data
ISO 1042:1998 Laboratory glassware — One-mark volumetric flasks
ISO 648:2008 Laboratory glassware — Single-volume pipettes
EN 482:2012+A1:2015 Workplace exposure - General requirements for the performance of procedures for the measurement of chemical agents
ISO 21438-3:2010 Workplace atmospheres — Determination of inorganic acids by ion chromatography — Part 3: Hydrofluoric acid and particulate fluorides
ISO/IEC Guide 99:2007 International vocabulary of metrology Basic and general concepts and associated terms (VIM)
CEN/TR 15230:2005 Workplace atmospheres - Guidance for sampling of inhalable, thoracic and respirable aerosol fractions
ISO 8655-2:2002 Piston-operated volumetric apparatus Part 2: Piston pipettes
EN 13205:2001 Workplace atmospheres - Assessment of performance of instruments for measurement of airborne particle concentrations
EN 1540:2011 Workplace exposure - Terminology
EN 1232:1997 Workplace atmospheres - Pumps for personal sampling of chemical agents - Requirements and test methods
ISO 8655-6:2002 Piston-operated volumetric apparatus Part 6: Gravimetric methods for the determination of measurement error
ISO/IEC Guide 98-3:2008 Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)

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