标准编号：ISO 16258-2:2015
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2部分：间接分析法
英文名称：Workplace air — Analysis of respirable crystalline silica by X-ray diffraction — Part 2: Method by indirect analysis
发布日期：2015-09
标准范围
This part of ISO 16258 specifies the analysis of RCS in samples of air collected on collection substrates(i.e. filters or foams) by X-ray diffraction, when using an analytical approach where dust from thesample collection substrate (i.e. filter or foam) is recovered, treated and deposited on another filterfor analysis by the instrument. This part of ISO 16258 includes information on the instrumentalparameters, sensitivity of different sampling apparatus, the use of different filters, sample treatmentto remove interference and correction for absorption effects. In this part of ISO 16258, the expressionrespirable crystalline silica includes the most common polymorphs quartz and cristobalite. The lesscommon polymorphs of crystalline silica, such as tridymite, are not included within the scope of thispart of ISO 16258 because a standard reference material is not available. Under certain circumstances(i.e. low filter dust loads, low silica content), the analytical approach described in this method may notfulfil the expanded uncertainty requirements of EN 482[7]. Guidance for calculation of uncertainty formeasurements of RCS is given in ISO 24095.
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