BS ISO 13794:2019 PDF

Scope: What is ISO 13794 - TEM for asbestos about? ISO 13794 discusses ambient air with a focus on asbestos presence. ISO 13794 specifies a reference method using transmission electron microscopy for the determination of airborne asbestos fibres and structures 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. ISO 13794 describes the method that allows the determination of the types of asbestos fibres present. Note: 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. Who is ISO 13794 - TEM for asbestos for ? ISO 13794 on the determination of asbestos fibres is useful for:

BS ISO 13794:2019 history

2019 BS ISO 13794:2019 Ambient air. Determination of asbestos fibres. Indirect-transfer transmission electron microscopy method
1999 BS ISO 13794:1999 Ambient air - Determination of asbestos fibres - Indirect-transfer transmission electron microscopy method