标准摘要
[中文适用范围]： 该方法的原理是等速地从移动的气流中抽取已知体积，使采样气体通过过滤介质以去除颗粒物质（包括纤维），处理过滤器使其在显微镜下观察时透明，并计算使用相差光学显微镜观察精确数量的视野中的纤维数量。 该方法可用于确定来自各种工业过程的管道、烟囱或烟道中流动气流中的纤维浓度。 [外文原描述]： 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.
英文名称Stationary source emissions — Determination of asbestos plant emissions — Method by fibre count measurement