NF ISO 13794

NF ISO 13794

April 2020
Standard Current

Ambient air - Determination of asbestos fibres - Indirect-transfer transmission electron microscopy method

This document specifies a reference method using transmission electron microscopy for the determination of airborne asbestos fibres and structures in in a wide range of ambient air situations, including the interior atmospheres of buildings, and for a detailed evaluation for asbestos structures in any atmosphere. The specimen preparation procedure incorporates ashing and dispersion of the collected particulate, so that all asbestos is measured, including the asbestos originally incorporated in particle aggregates or particles of composite materials. The lengths, widths and aspect ratios of the asbestos fibres and bundles are measured, and these, together with the density of the type of asbestos, also allow the total mass concentration of airborne asbestos to be calculated. The method allows determination of the type(s) of asbestos fibres present. The method cannot discriminate between individual fibres of the asbestos and elongate fragments (cleavage fragments and acicular particles) from non-asbestos analogues of the same amphibole mineral[12].

See more
View the extract
Main informations

Collections

National standards and national normative documents

Publication date

April 2020

Number of pages

88 p.

Reference

NF ISO 13794

ICS Codes

13.040.40   Stationary source emissions

Classification index

X43-054

Print number

1

International kinship

ISO 13794:2019
Sumary
Ambient air - Determination of asbestos fibres - Indirect-transfer transmission electron microscopy method

This document specifies a reference method using transmission electron microscopy for the determination of airborne asbestos fibres and structures in in a wide range of ambient air situations, including the interior atmospheres of buildings, and for a detailed evaluation for asbestos structures in any atmosphere. The specimen preparation procedure incorporates ashing and dispersion of the collected particulate, so that all asbestos is measured, including the asbestos originally incorporated in particle aggregates or particles of composite materials. The lengths, widths and aspect ratios of the asbestos fibres and bundles are measured, and these, together with the density of the type of asbestos, also allow the total mass concentration of airborne asbestos to be calculated. The method allows determination of the type(s) of asbestos fibres present. The method cannot discriminate between individual fibres of the asbestos and elongate fragments (cleavage fragments and acicular particles) from non-asbestos analogues of the same amphibole mineral[12].

Table of contents
View the extract
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Symboles et abréviations
  • 5 Type d'échantillon
  • 6 Plage de mesure
  • 7 Limite de détection
  • 8 Principe
  • 9 Réactifs
  • 10 Appareillage
  • 11 Prélèvement d'échantillons d'air
  • 12 Mode opératoire d'analyse
  • 13 Caractéristiques de performance
  • 14 Rapport d'essai
  • Annexe A Détermination des conditions de fonctionnement du four à plasma
  • Annexe B Détermination et normalisation des conditions de fonctionnement du bain à ultrasons
  • Annexe C Modes opératoires d'étalonnage
  • Annexe D Critères de comptage des structures
  • Annexe E Mode opératoire d'identification des fibres
  • Annexe F Détermination de la concentration en fibres et faisceaux d'amiante d'une longueur supérieure à 5 micron m, et de la concentration en fibres d'amiante équivalent MOCP
  • Annexe G Calcul des résultats
  • Annexe H Mode opératoire d'essai pour déterminer l'adéquation de filtres de prélèvement d'échantillons en ester de cellulose
  • Annexe I Stratégies de prélèvement d'échantillons d'air
  • Bibliographie
ZOOM ON ... the Requirements department
To comply with a standard, you need to quickly understand its issues in order to determine its impact on your activity.

The Requirements department helps you quickly locate within the normative text:
- mandatory clauses to satisfy,
- non-essential but useful clauses to know, such as permissions and recommendations.

The identification of these types of clauses is based on the document “ISO / IEC Directives, Part 2 - Principles and rules of structure and drafting of ISO documents ”as well as on a constantly enriched list of verbal forms.

With Requirements, quickly access the main part of the normative text!

With Requirements, quickly access the main part of the normative text!
Need to identify, monitor and decipher standards?

COBAZ is the simple and effective solution to meet the normative needs related to your activity, in France and abroad.

Available by subscription, CObaz is THE modular solution to compose according to your needs today and tomorrow. Quickly discover CObaz!

Request your free, no-obligation live demo

I discover COBAZ