BS ISO 10312-1995 周围环境空气.石棉纤维的测定.直接传递透射电子显微法

标准号：BS ISO 10312-1995
中文标准名称：周围环境空气.石棉纤维的测定.直接传递透射电子显微法
英文标准名称：Ambient air. Determination of asbestos fibres. Direct-transfer transmission electron microscopy method
标准类型：C51
发布日期：1995/10/15 12:00:00
实施日期：1995/10/15 12:00:00
中国标准分类号：C51
国际标准分类号：13.040.20
适用范围：1 Substance determined This International Standard specifies a reference method using transmission electron microscopy for the determination of the concentration of asbestos structures in ambient atmospheres and includes measurement of the lengths, widths and aspect ratios of the asbestos structures. The method allows deter-mination of the type(s) of asbestos fibres present. The method cannot discriminate between individual fibres of the asbestos and non-asbestos analogues of the same amphibole mineral. 2 Type of sample The method is defined for polycarbonate capillary-pore filters or cellulose ester (either mixed esters of cellu-lose or cellulose nitrate) filters through which a known volume of air has been drawn. The method is suitable for determination of asbestos in both exterior and building atmospheres. 3 Measuring range The range of concentration which can be determined is 50 structures/mm