空气质量.散装材料.第3部分：用X射线衍射法对石棉的定量测定

[中文适用范围]： ISO 22262 本部分主要用于对已鉴定出石棉含量估计低于约 5%（重量）的样品进行定量分析。ISO 22262 本部分通过在 XRD 定量分析之前使用简单的灰化和/或酸处理程序，扩展了定量分析的适用性和检测限。ISO 22262 本部分适用于 ISO 22262-1 中鉴定出的含石棉材料。以下是样品基质的示例：a) 任何经 ISO 22262-1 分析检测出石棉的建筑材料；b) 弹性地砖、沥青材料、屋顶毛毡以及任何其他石棉嵌入有机基质中，且使用 ISO 22262-1 检测出石棉的材料；c) 墙面和天花板灰泥，无论是否含骨料，使用 ISO 22262-1 检测出石棉。如果基质中含有非石棉状蛇纹石或非石棉状闪石矿物，则被假定为“可能为石棉的峰”的XRD峰将代表这些矿物。本方法不适用于可能含有石棉的天然矿物或任何含有此类天然矿物的产品。本方法仅适用于含有故意添加的商用级石棉（包括透闪石石棉）的建筑材料样品。ISO 22262的本部分适用于熟悉X射线衍射法以及参考文献[5]和[6]中规定的其他分析程序的分析人员。ISO 22262的本部分并非旨在提供基本分析程序的基本指导。 [外文原描述]： ISO 22262-3:2016 is primarily intended for quantitative analysis of samples in which asbestos has been identified at estimated mass fractions lower than approximately 5 % by weight. ISO 22262-3:2016 extends the applicability and limit of detection of quantitative analysis by the use of simple procedures of ashing and/or acid treatment prior to XRD quantification. ISO 22262-3:2016 is applicable to the asbestos-containing materials identified in ISO 22262‑1. The following are examples of sample matrices: a) any building materials in which asbestos was detected by the analysis in ISO 22262‑1; b) resilient floor tiles, asphaltic materials, roofing felts and any other materials in which asbestos is embedded in an organic matrix and in which asbestos was detected when using ISO 22262‑1; c) wall and ceiling plasters, with or without aggregate, in which asbestos was detected when using ISO 22262‑1. If non-asbestiform serpentine or non-asbestiform amphibole minerals are included in the matrix, the XRD peaks that are assumed to be "possible peaks of asbestos" will represent these minerals. This method is not for application to natural minerals that may contain asbestos or any products that incorporate such natural minerals. This method is intended only for application to building material samples that contain deliberately added commercial grade asbestos including tremolite asbestos. ISO 22262-3:2016 is intended for use by analysts who are familiar with X-ray diffraction methods and the other analytical procedures specified in the References [5] and [6]. It is not the intention of this part of ISO 22262 to provide basic instruction in the fundamental analytical procedures.