NF ISO 21438-2

NF ISO 21438-2

January 2010
Standard Cancelled

Workplace atmospheres - Determination of inorganic acids by ion chromatography - Part 2 : volatile acids, except hydrofluoric acid (hydrochloric acid, hydrobromic acid and nitric acid)

ISO 21438-2:2009 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 and to static (area) sampling.The analytical method is applicable to the determination of masses of 0,01 mg to 2,5 mg 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 240-litre air sample, the working range is approximately 0,04 mg/m3 to 10 mg/m3 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.

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Collections

National standards and national normative documents

Thematics

Gestion des risques et SST

Publication date

January 2010

Number of pages

37 p.

Reference

NF ISO 21438-2

ICS Codes

13.040.30   Workplace atmospheres

Classification index

X43-211-2

Print number

1 - 03/02/2010

International kinship

ISO 21438-2:2009
Sumary
Workplace atmospheres - Determination of inorganic acids by ion chromatography - Part 2 : volatile acids, except hydrofluoric acid (hydrochloric acid, hydrobromic acid and nitric acid)

ISO 21438-2:2009 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 and to static (area) sampling.

The analytical method is applicable to the determination of masses of 0,01 mg to 2,5 mg 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 240-litre air sample, the working range is approximately 0,04 mg/m3 to 10 mg/m3 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.

Standard replaced by (1)
NF ISO 21438-2
February 2024
Standard Current
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.

Table of contents
  • Avant-propos
    v
  • Introduction
    VI
  • 1 Domaine d'application
    1
  • 2 Références normatives
    1
  • 3 Termes et définitions
    2
  • 3.1 Définitions générales
    2
  • 3.2 Définitions des fractions de taille des particules
    3
  • 3.3 Définitions relatives au prélèvement
    4
  • 3.4 Définitions relatives à l'analyse
    4
  • 3.5 Termes statistiques
    5
  • 4 Principe
    7
  • 5 Exigence
    7
  • 6 Réactifs
    7
  • 7 Appareillage
    9
  • 7.1 Matériel de prélèvement
    9
  • 7.2 Appareillage de laboratoire
    11
  • 8 Évaluation de l'exposition professionnelle
    13
  • 8.1 Généralités
    13
  • 8.2 Prélèvement individuel
    13
  • 8.3 Prélèvement à point fixe
    14
  • 8.4 Sélection des conditions de mesurage et du mode de mesurage
    14
  • 9 Prélèvement
    15
  • 9.1 Considérations préliminaires
    15
  • 9.2 Préparation du prélèvement
    17
  • 9.3 Point de prélèvement
    18
  • 9.4 Prélèvement des échantillons
    18
  • 9.5 Transport
    18
  • 10 Analyse
    19
  • 10.1 Préparation des solutions d'essai et d'étalonnage
    19
  • 10.2 Analyse instrumentale
    20
  • 10.3 Estimation des limites de détection et de quantification
    21
  • 10.4 Maîtrise de la qualité
    22
  • 10.5 Incertitude de mesure
    22
  • 11 Expression des résultats
    23
  • 12 Performances de la méthode
    23
  • 12.1 Efficacité de prélèvement et conservation des échantillons
    23
  • 12.2 Limites de quantification
    24
  • 12.3 Limites supérieures de l'étendue de mesure
    24
  • 12.4 Biais et fidélité
    24
  • 12.5 Incertitude de la méthode de prélèvement et d'analyse
    24
  • 12.6 Interférences
    24
  • 13 Rapport d'essai
    25
  • 13.1 Procès-verbal de l'essai
    25
  • 13.2 Rapport de laboratoire
    26
  • Annexe A (informative) Correction de température et de pression
    27
  • Annexe B (normative) Nature du filtre
    29
  • Bibliographie
    30
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