STP1342

    International Organization for Standardization Methods for Determination of Asbestos in Air

    Published: Jan 1999


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    Abstract

    Two International Standards for measurement of asbestos in air by transmission electron microscopy (TEM) have been approved. A key feature of the ISO TEM methods is the ability, from a single examination, to derive fiber concentrations for comparison with all known legislated control limits, and to provide a coded description of the size and nature of each asbestos structure to assist in the interpretation of health effects. The direct-transfer TEM method for determination of asbestos in air (ISO 10312) was published as an International Standard in May 1995. Voting on an indirect-transfer TEM method (ISO 13794) has been completed, and the final draft has been submitted for publication. A method for determination of the concentration of inorganic fibers in air, based on scanning electron microscopy (SEM), has recently been submitted for voting as a Draft International Standard, currently designated as ISO/DIS 14966. A new working group, ISO/TC 146/SC 6/WG4, was formed in late 1996, to develop International Standards for sampling strategy for determination of asbestos and other mineral fibers in building atmospheres.

    Keywords:

    Asbestos, fiber, air, water, ambient, atmosphere, transmission electron microscopy, scanning electron microscopy, international standard, building, indoor air


    Author Information:

    Chatfield, Eric J.
    President, Chatfield Technical Consulting Limited, Mississauga, Ontario


    Paper ID: STP42335S

    Committee/Subcommittee: D22.05

    DOI: 10.1520/STP42335S


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