1.1 本规程涵盖使用实验室原子光谱分析技术（如电感耦合等离子体原子发射光谱法（ICP-AES）、火焰原子吸收光谱法（FAAS））测定铅的热板法对土壤样品和相关质量控制（QC）样品进行干燥、均化和酸消解，石墨炉原子吸收光谱法。 1.2 该实践基于美国。 美国环保署 软件 846，试验方法 3050 1.3 本规程包含解释性注释，不属于本标准强制性要求的一部分。 1.4 以国际单位制表示的数值应视为标准值。国际单位制后括号中给出的值仅供参考，不被视为标准值。 1.5 本标准并非旨在解决与其使用相关的所有安全问题（如有）。 本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 需要监测建筑物和相关结构内及其周围的铅含量，以确定潜在的铅危害。因此，需要有效的方法制备土壤样品，以测定其铅含量。 5.2 本规程可用于消化在建筑物和相关结构内及周围与铅减排相关的各种施工和改造活动中收集的土壤样本。该方法也适用于消化从其他位置（如道路和钢结构附近）收集的土壤样品，以进行铅分析。 5.3 本规程旨在用于制备为危险评估目的收集的样品。 5.4 本规程无法测定不溶于硝酸的基质（如二氧化硅）中结合的铅。 5.5 该实践包括干燥和均质步骤，以帮助确保报告的铅结果代表样品，并且与不同采样位置之间土壤湿度水平的潜在差异或不断变化的天气条件无关。

1.1 This practice covers drying, homogenization, and acid digestion of soil samples and associated quality control (QC) samples using a hot plate type method for the determination of lead using laboratory atomic spectrometry analysis techniques such as inductively coupled plasma atomic emission spectrometry (ICP-AES), flame atomic absorption spectrometry (FAAS), and graphite furnace atomic absorption spectrometry (GFAAS). 1.2 This practice is based on U.S. EPA SW 846, Test Method 3050. 1.3 This practice contains notes that are explanatory and are not part of the mandatory requirements of this standard. 1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 There is a need to monitor the lead content in and around buildings and related structures in order to determine the potential lead hazard. Hence, effective and efficient methods are required for the preparation of soil samples for determination of their lead content. 5.2 This practice may be used for the digestion of soil samples that are collected during various construction and renovation activities associated with lead abatement in and around buildings and related structures. The practice is also suitable for the digestion of soil samples for lead analyses collected from other locations, such as near roads and steel structures. 5.3 This practice is intended to be used to prepare samples that have been collected for hazard assessment purposes. 5.4 This practice is not capable of determining lead bound within matrices, such as silica, that are not soluble in nitric acid. 5.5 This practice includes drying and homogenization steps in order to help assure that reported lead results are representative of the sample and are independent of potential differences in soil moisture levels among different sampling locations or changing weather conditions.