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  • BSI
    BS ISO 13794:2019 Ambient air. Determination of asbestos fibres. Indirect-transfer transmission electron microscopy method
    Edition: 2019
    $557.44
    / user per year

Description of BS ISO 13794:2019 2019

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].



Standard NumberBS ISO 13794:2019
TitleAmbient air. Determination of asbestos fibres. Indirect-transfer transmission electron microscopy method
StatusRevision Underway
Publication Date2019-10-09
ReplacesBS ISO 13794:1999
Identical National Standard OfISO 13794
DescriptorsTest equipment, Asbestos, Calibration, Equations, Working range, Sensitivity, Mathematical calculations, Counting, Performance, Sampling equipment, Length, Air pollution, Particulate air pollutants, Dimensional measurement, Aspect ratio, Microscopic analysis, Shape, Air, Density, Amphiboles, Sampling methods, Electron microscopes, Filtration, Mineral fibres, Identification methods, Poisson distribution, Interferences (chemical), Testing conditions, Ash determination, Fibres, Bibliography, Test specimens, Determination of content, Classification systems, Reports, Width, Specimen preparation, Concentration (chemical), Toxic materials, Confidence limits
ICS13.040.20 Ambient atmospheres
CommitteeEH/2/3
ISBN978 0 539 00273 7
PublisherBSI
Pages90

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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