标准编号：ISO 16258-1:2015
中文名称：工作场所空气 用X射线衍射分析可吸入结晶二氧化硅 第1部分：直接过滤法
英文名称：Workplace air — Analysis of respirable crystalline silica by X-ray diffraction — Part 1: Direct-on-filter method
发布日期：2015-09
标准范围
This part of ISO 16258 specifies the analysis of respirable crystalline silica (RCS) in samples of aircollected on 25 mm-filters by X-ray diffraction, when using an analytical approach where the dust onthe air sample filter is directly analysed by the instrument. This part of ISO 16258 includes informationon the instrumental parameters, sensitivity of different sampling apparatus, uses of different filtersand correction for absorption effects. In this part of ISO 16258, the expression RCS includes the mostcommon polymorphs quartz and cristobalite. The less common polymorphs of crystalline silica, suchas tridymite, are not included within the scope of this part of ISO 16258 because a standard referencematerial is not available. Under certain circumstances (i.e. low filter dust loads, low silica content), theanalytical approach described in this method may not fulfil the expanded uncertainty requirements ofEN 482.[5] Guidance for calculation of uncertainty for measurements of RCS is given in ISO 24095.
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