BS ISO 13794:1999 PDF

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

First page of standard BS ISO 13794:1999

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Title (English):

BS ISO 13794:1999

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

Document status:: Withdrawn
Format:: Electronic (PDF)
Publication date:: November 15, 1999
ICS:: 13.040.20
SKU:: BS ISO 13794:1999

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Abstract

1 Scope

1.1 Substance determined This International Standard specifies a reference method using transmission electron microscopy (TEM) for determination of the concentration of asbestos structures in ambient atmospheres. 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 fibre present. The method cannot discriminate between individual fibres of the asbestos and non- asbestos analogues of the same amphibole mineral.

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1 Scope

BS ISO 13794:1999 PDF

Abstract

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Abstract

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