NF ISO 21438-3

NF ISO 21438-3

November 2010
Standard Current

Workplace air - Determination of inorganic acids by ion chromatography - Part 3 : hydrofluoric acid and particulate fluorides

ISO 21438-3:2010 specifies a method for the determination of the time-weighted average mass concentration of soluble particulate fluorides and hydrofluoric acid (HF) in workplace air by collection of the particulate fluorides on a pre-filter and HF on an alkali-impregnated filter and analysis by ion chromatography. The method is only applicable to determination of particulate fluorides that are soluble using the sample preparation procedure specified. For aerosol sampling, the method is applicable to the personal sampling of the inhalable fraction of airborne particles, as defined in ISO 7708, and to static (area) sampling. The method is applicable to the determination of masses of 0,005 mg to at least 1,25 mg of particulate fluorides per sample and 0,012 5 mg to at least 1,2 mg of HF per sample. The concentration range of particulate fluorides and HF in air for which the measuring procedure is applicable is determined by the sampling method selected by the user. For a 120 l air sample, the working range is approximately 0,04 mg m-3 to at least 10 mg m-3 for particulate fluorides and approximately 0,13 mg m-3 to at least 10 mg m-3 for HF. HF can react with co-sampled particulate matter on the pre-filter, causing an interference on the measured concentration.

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Main informations

Collections

National standards and national normative documents

Thematics

Gestion des risques et SST

Publication date

November 2010

Number of pages

37 p.

Reference

NF ISO 21438-3

ICS Codes

13.040.30   Workplace atmospheres

Classification index

X43-211-3

Print number

1 - 03/11/2010

International kinship

ISO 21438-3:2010
Sumary
Workplace air - Determination of inorganic acids by ion chromatography - Part 3 : hydrofluoric acid and particulate fluorides

ISO 21438-3:2010 specifies a method for the determination of the time-weighted average mass concentration of soluble particulate fluorides and hydrofluoric acid (HF) in workplace air by collection of the particulate fluorides on a pre-filter and HF on an alkali-impregnated filter and analysis by ion chromatography.

The method is only applicable to determination of particulate fluorides that are soluble using the sample preparation procedure specified.

For aerosol sampling, the method is applicable to the personal sampling of the inhalable fraction of airborne particles, as defined in ISO 7708, and to static (area) sampling.

The method is applicable to the determination of masses of 0,005 mg to at least 1,25 mg of particulate fluorides per sample and 0,012 5 mg to at least 1,2 mg of HF per sample.

The concentration range of particulate fluorides and HF in air for which the measuring procedure is applicable is determined by the sampling method selected by the user. For a 120 l air sample, the working range is approximately 0,04 mg m-3 to at least 10 mg m-3 for particulate fluorides and approximately 0,13 mg m-3 to at least 10 mg m-3 for HF.

HF can react with co-sampled particulate matter on the pre-filter, causing an interference on the measured concentration.

Table of contents
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  • Avant-propos
    iv
  • Introduction
    v
  • 1 Domaine d'application
    1
  • 2 Références normatives
    1
  • 3 Termes et définitions
    2
  • 4 Principe
    8
  • 5 Exigence
    9
  • 6 Réactifs
    9
  • 7 Appareillage
    11
  • 8 Évaluation de l'exposition professionnelle
    14
  • 9 Prélèvement
    16
  • 10 Analyse
    20
  • 11 Expression des résultats
    24
  • 12 Performances de la méthode
    24
  • 13 Rapport d'essai
    25
  • Annexe A (informative) Correction de température et de pression
    27
  • Annexe B (normative) Matériaux des filtres
    29
  • Bibliographie
    30
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