International Standard
ISO 13794:2019
Ambient air — Determination of asbestos fibres — Indirect-transfer transmission electron microscopy method
Reference number
ISO 13794:2019
Edición 2
2019-10
International Standard
Vista previa
ISO 13794:2019
75576
No disponible en español
Publicado (Edición 2, 2019)

ISO 13794:2019

ISO 13794:2019
75576
Idioma
Formato
CHF 194
Convertir Franco suizo (CHF) a tu moneda

Resumen

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].

Informaciones generales

  •  : Publicado
     : 2019-10
    : Norma Internacional publicada [60.60]
  •  : 2
     : 80
  • ISO/TC 146/SC 3
    13.040.20 
  • RSS actualizaciones

¿Tiene alguna duda?

Consulte nuestras Ayuda y asistencia