1.1 本规程涵盖了用于测定铅的表面粉尘样品（使用擦拭取样规程收集）和相关质量控制（QC）样品的酸消解。 1.2 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.2.1 例外情况- 信息英寸磅单位在中提供 附注3 . 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 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。 1.5 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 本规程旨在消化在建筑物和相关结构内及其周围进行的各种铅危害活动中收集的除尘器样品中的铅。 5.2 本规程还适用于建筑物翻修期间和之后收集的防尘布样品中铅的消解。 5.3 本规程适用于按照规程收集或未收集的除尘样品的消解 E1728/E1728M 使用可能或可能不符合规范的擦拭布 E1792 . 5.4 本规程适用于放置在硬壁、刚性容器（如50 mL离心管或柔性塑料袋）中的除尘样品的消解。 注2: 由于难以对塑料袋中的一些样品进行定量转移，在实践中建议使用硬壁刚性容器，如50 mL塑料离心管 E1728/E1728M 用于样本采集。 5.5 根据本实施规程制备的消化液旨在使用光谱测定技术（如电感耦合等离子体原子发射光谱法（ICP-AES）和火焰原子吸收光谱法（FAAS））分析铅浓度（见试验方法 E1613 , E3193 和 E3203 )或使用电化学技术，如阳极溶出伏安法（见实践 E2051年 ). 5.6 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。 5.7 本规程能够测定油漆中的铅含量。

1.1 This practice covers the acid digestion of surface dust samples (collected using wipe sampling practices) and associated quality control (QC) samples for the determination of lead. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.2.1 Exception— Informational inch-pound units are provided in Note 3 . 1.3 This practice contains notes which are explanatory and not part of mandatory requirements of the standard. 1.4 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. 1.5 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 This practice is intended for the digestion of lead in dust wipe samples collected during various lead hazard activities performed in and around buildings and related structures. 5.2 This practice is also intended for the digestion of lead in dust wipe samples collected during and after building renovations. 5.3 This practice is applicable to the digestion of dust wipe samples that have or have not been collected in accordance with Practice E1728/E1728M using wipes that may or may not conform to Specification E1792 . 5.4 This practice is applicable to the digestion of dust wipe samples that were placed in either hard-walled, rigid containers such as 50-mL centrifuge tubes or flexible plastic bags. Note 2: Due to the difficulty in performing quantitative transfers of some samples from plastic bags, hard-walled rigid containers such as 50-mL plastic centrifuge tubes are recommended in Practice E1728/E1728M for sample collection. 5.5 Digestates prepared according to this practice are intended to be analyzed for lead concentration using spectrometric techniques such as Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES) and Flame Atomic Absorption Spectrometry (FAAS) (see Test Methods E1613 , E3193 , and E3203 ), or using electrochemical techniques such as anodic stripping voltammetry (see Practice E2051 ). 5.6 This practice is not capable of determining lead bound within matrices, such as silica, that are not soluble in nitric acid. 5.7 This practice is capable of determining lead bound within paint.