BS ISO 14966:2019 - Ambient air. Determination of numerical concentration of inorganic fibrous particles. Scanning electron microscopy method

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BS ISO 14966:2019

Ambient air. Determination of numerical concentration of inorganic fibrous particles. Scanning electron microscopy method

Status : Current   Published : December 2019

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PDF

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HARDCOPY



This document specifies a method using scanning electron microscopy for determination of the concentration of inorganic fibrous particles in the air. The method specifies the use of gold-coated, capillary-pore, track-etched membrane filters, through which a known volume of air has been drawn. Using energy-dispersive X-ray analysis, the method can discriminate between fibres with compositions consistent with those of the asbestos varieties (e.g. serpentine and amphibole), gypsum, and other inorganic fibres. Annex C provides a summary of fibre types which can be measured.

This document is applicable to the measurement of the concentrations of inorganic fibrous particles in ambient air. The method is also applicable for determining the numerical concentrations of inorganic fibrous particles in the interior atmospheres of buildings, for example to determine the concentration of airborne inorganic fibrous particles remaining after the removal of asbestos-containing products.

The range of concentrations for fibres with lengths greater than 5 µm, in the range of widths which can be detected under standard measurement conditions (see 7.2), is approximately 3 fibres to 200 fibres per square millimetre of filter area. The air concentrations, in fibres per cubic metre, represented by these values are a function of the volume of air sampled.

The ability of the method to detect and classify fibres with widths lower than 0,2 µm is limited. If airborne fibres in the atmosphere being sampled are predominantly <0,2 µm in width, a transmission electron microscopy method such as ISO 10312[8] can be used to determine the smaller fibres.




Standard NumberBS ISO 14966:2019
TitleAmbient air. Determination of numerical concentration of inorganic fibrous particles. Scanning electron microscopy method
StatusCurrent
Publication Date17 December 2019
Cross ReferencesVDI 3492:2013-06, VDI-Bericht 475, ISO 10312, VDI 3866-Part 5:2017-06, VDI 3866
ReplacesBS ISO 14966:2002
International RelationshipsISO 14966:2019
Draft Superseded By18/30375050 DC
DescriptorsDetermination of content, Microscopic analysis, Electron microscopes, Mineral fibres, Asbestos, Air pollution, Quality, X-ray analysis, Particle size distribution, Particulate air pollutants, Air, Concentration (chemical), Fibres, Gypsum
ICS13.040.20
Title in FrenchAir ambiant. Détermination de la concentration en nombre des particules inorganiques fibreuses. Méthode par microscopie électronique à balayage
CommitteeEH/2/3
ISBN978 0 539 00356 7
PublisherBSI
FormatA4
DeliveryYes
Pages58
File Size5.031 MB
Price£254.00


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