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.
État actuel: PubliéeDate de publication: 1993-08
Edition: 1Nombre de pages: 21
Comité technique: ISO/TC 146/SC 1 Émissions de sources fixes
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|std 1 124|
|std 2 124||Papier|