标准摘要
[中文适用范围]： ISO 16258 的这一部分规定了当使用回收样品收集基底（即过滤器或泡沫）中的灰尘的分析方法时，通过 X 射线衍射对收集基底（即过滤器或泡沫）上收集的空气样品中的 RCS 进行分析，处理并沉积在另一个过滤器上以供仪器分析。 ISO 16258的这一部分包括有关仪器参数、不同采样装置的灵敏度、不同过滤器的使用、消除干扰的样品处理以及吸收效应校正的信息。 在 ISO 16258 的这一部分中，可吸入结晶二氧化硅这一表述包括最常见的多晶型物石英和方英石。 不太常见的结晶二氧化硅多晶型物（例如鳞石英）不包括在 ISO 16258 本部分的范围内，因为没有标准参考材料。 在某些情况下（即过滤器粉尘含量低、二氧化硅含量低），本方法中描述的分析方法可能无法满足 EN 482[7] 扩展不确定度要求。 ISO 24095 中给出了 RCS 测量不确定度计算指南。 [外文原描述]： ISO 16258-2:2015 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 the sample collection substrate (i.e. filter or foam) is recovered, treated and deposited on another filter for analysis by the instrument. This part of ISO 16258 includes information on the instrumental parameters, sensitivity of different sampling apparatus, the use of different filters, sample treatment to remove interference and correction for absorption effects. In this part of ISO 16258, the expression respirable crystalline silica includes the most common polymorphs quartz and cristobalite. The less common polymorphs of crystalline silica, such as tridymite, are not included within the scope of this part 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 not fulfil the expanded uncertainty requirements of EN 482[7]. Guidance for calculation of uncertainty for measurements of RCS is given in ISO 24095.
英文名称Workplace air — Analysis of respirable crystalline silica by X-ray diffraction — Part 2: Method by indirect analysis