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    International Organization for Standardization Methods for Determination of Asbestos in Air

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    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.


    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

    Committee/Subcommittee: D22.05

    DOI: 10.1520/STP42335S