Resumen
The principle of the method specified is isokinetically withdrawing a known volume from a moving gas stream, passing the sampled gas through a filter medium to remove particulate matter (including fibres), treating the filter to make it transparent when viewed under a microscope and counting the number of fibres in a precise number of fields viewed using a phase-contrast optical microscope. The method may be used to determine fibre concentrations in flowing gas streams in ducts, chimneys, or flues from a wide range of industrial processes.
Informaciones generales
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Estado: PublicadoFecha de publicación: 1993-08Etapa: Norma Internacional confirmada [90.93]
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Edición: 1Número de páginas: 19
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Comité Técnico :ISO/TC 146/SC 1ICS :13.040.40
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