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Air quality — Bulk materials — Part 1: Sampling and qualitative determination of asbestos in commercial bulk materials
bulk materials. This part of ISO 22262 specifies appropriate sample preparation procedures and describes in
detail the procedure for identification of asbestos by polarized light microscopy and dispersion staining.
This part of ISO 22262 also specifies simple procedures for separation of asbestos fibres from matrix materials
such as asphalt, cement, and plastics products. Optionally, identification of asbestos can be carried out using
scanning electron microscopy or transmission electron microscopy with energy dispersive X-ray analysis.
Information is also provided on common analytical problems, interferences and other types of fibre that may
be encountered in the analysis.
This part of ISO 22262 is applicable to qualitative identification of asbestos in specific types of manufactured
asbestos-containing products and commercial minerals. This part of ISO 22262 is applicable to the analysis
of fireproofing, thermal insulation, and other manufactured products or minerals in which asbestos fibres can
readily be separated from matrix materials for identification.
NOTE This part of ISO 22262 is intended for use by microscopists who are familiar with polarized light microscopy
methods and the other analytical procedures specified (References [16]?[19]). It is not the intention of this part of ISO 22262
to provide instruction in the fundamental analytical techniques.
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