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

BS ISO 13794:2019

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

Status : Current   Published : October 2019

Format
PDF

Format
HARDCOPY



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
StatusCurrent
Publication Date09 October 2019
Normative References(Required to achieve compliance to this standard)ISO 4225
Informative References(Provided for Information)ISO 22309, ISO 16000-7, ISO 15932, ISO 10312, ISO 25498, ISO 29301, ISO 22029, ISO 8672
ReplacesBS ISO 13794:1999
International RelationshipsISO 13794:2019
Draft Superseded By18/30374686 DC
DescriptorsSpecimen preparation, Shape, Density, Testing conditions, Mineral fibres, Equations, Confidence limits, Particulate air pollutants, Counting, Calibration, Asbestos, Working range, Ash determination, Electron microscopes, Length, Width, Test equipment, Sensitivity, Classification systems, Bibliography, Reports, Air, Aspect ratio, Poisson distribution, Performance, Toxic materials, Identification methods, Filtration, Concentration (chemical), Test specimens, Interferences (chemical), Determination of content, Amphiboles, Mathematical calculations, Sampling methods, Air pollution, Microscopic analysis, Sampling equipment, Fibres, Dimensional measurement
ICS13.040.20
Title in FrenchAir ambiant. Dosage des fibres d'amiante. Méthode par microscopie électronique à transmission par transfert indirect
CommitteeEH/2/3
ISBN978 0 539 00273 7
PublisherBSI
FormatA4
DeliveryYes
Pages90
File Size6.457 MB
Price£274.00


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