工作场所空气 - 通过电感耦合等离子体原子发射光谱法测定空气中颗粒物中的金属和准金属 - 第1部分:取样

[中文适用范围]： 本文件规定了一种收集空气颗粒物样品的方法，以便随后使用电感耦合等离子体原子发射光谱法（ICP-AES）测定金属和准金属。 使用本文描述的方法获得的样品还可以随后通过其他仪器方法分析元素组成，例如原子吸收光谱法(AAS)或电感耦合等离子体质谱法(ICP-MS)。 该方法不适用于汞的取样，汞在环境温度下以气相存在于空气中；属于永久气体的金属和准金属的无机化合物，例如砷化氢（AsH3）；或在环境温度下以气相存在的金属和准金属的无机化合物，例如三氧化二砷（As2O3）。 注：虽然该方法没有描述收集气相中存在的金属和准金属无机化合物的方法，但在大多数情况下，通过使用经过预处理以捕获感兴趣的化合物，例如用碳酸钠浸渍的支撑纸垫适合收集三氧化二砷（参见 ISO 11041[2]）。 该方法适用于 ISO 7708 中定义的可吸入、胸部或可呼吸空气颗粒部分的个人采样，以及静态采样。 本文件不包括表面或散装材料的取样。 有关表面样品收集的指南可在 ASTM D7659[7] 中找到。 [外文原描述]： This document specifies a method for collecting samples of airborne particulate matter for subsequent determination of metals and metalloids using inductively coupled plasma — atomic emission spectrometry (ICP-AES). Samples obtained using the method described herein can also be subsequently analysed for elemental composition by other instrumental methods, such as atomic absorption spectrometry (AAS) or inductively coupled plasma mass spectrometry (ICP-MS). The method is not applicable to the sampling of mercury, which is present in air in the vapour phase at ambient temperatures; inorganic compounds of metals and metalloids that are permanent gases, e.g. arsine (AsH 3 ); or inorganic compounds of metals and metalloids that are present in the vapour phase at ambient temperatures, e.g. arsenic trioxide (As 2 O 3 ). NOTE Although the method does not describe a means of collecting inorganic compounds of metals and metalloids that are present in the vapour phase, in most instances this is relatively easily to achieve by using a back-up filter which has been pre-treated to trap the compound(s) of interest, e.g. a back-up paper pad impregnated with sodium carbonate is suitable for collecting arsenic trioxide (see ISO 11041 [2] ). The method is applicable to personal sampling of the inhalable, thoracic or respirable fraction of airborne particles, as defined in ISO 7708, and to static sampling. This document excludes sampling of surfaces or bulk materials. Guidance on collection of samples for surfaces may be found in ASTM D7659 [7] .