1.1 本规程涵盖了空气和表面粉尘样品（使用空气和擦拭取样方法收集）的消化以及相关的质量控制（QC）样品，用于通过稀氟化氢铵和硝酸的混合物测定金属和准金属。 1.2 以国际单位制表示的值应被视为标准值。本标准不包括其他计量单位。 1.3 本规程包含注释，这些注释是解释性的，不是标准强制性要求的一部分。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。本标准的使用者有责任在使用前建立适当的安全、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》中确立的国际公认的标准化原则制定的。 =====意义和用途====== 5.1 本规程旨在消化在工作场所、建筑物和相关结构内及周围进行的各种活动中收集的空气粉尘和擦尘样本中的金属和准金属。 5.2 本规程适用于根据试验方法收集的空气中灰尘和擦尘样品的消化 D4532 ，指南 D6062 ，实践 D7144 ，或指南 E1370 空气中的灰尘和实践 D6966 , D7296 , D7822 ，或 1728/1728米 使用可能符合或不符合规范的湿巾 D7707 或 E1792 . 5.2.1 本规程适用于从取样盒中取出的空气粉尘样品过滤器的消化，取样盒已被擦拭以收集附着在侧壁上的所有粉尘，并作为收集样品的一部分包含在硬壁容器中，如指南所述 D8358 . 5.2.2 本规程适用于使用酸溶性纤维素空气取样胶囊的空气粉尘样品的消化，该胶囊将盒中的全部内容物转移到硬- 有壁容器。 5.2.3 本规程适用于在硬壁容器中使用擦拭材料收集的沉降粉尘样本的消化。 5.3 根据本规程制备的消化液旨在使用光谱技术分析金属和准金属浓度，如电感耦合等离子体质谱法（ICP-MS）、电感耦合等离子体发射光谱法（ICP-OES）、石墨炉原子吸收光谱法（GFAAS）和火焰原子吸收光谱法（FAAS）（见试验方法 D4185 , D6785 , D7035 , D7439 , E1613 , E3193 ，以及 E3203 )，或使用阳极溶出伏安法等电化学技术检测铅（见实施规程 E2051 )，或使用光学荧光检测铍（见试验方法 D7202 ). 5.4 使用本程序开发内部测试方法的实验室应根据其认证机构规定的原则确定精度和偏差。

1.1 This practice covers the digestion of airborne and surface dust samples (collected using air and wipe sampling practices) and associated quality control (QC) samples for the determination of metals and metalloids by means of a mixture of dilute ammonium bifluoride and nitric acid. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This practice contains notes which are explanatory and not part of the 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 metals and metalloids in airborne dust and dust wipe samples collected during various activities performed in and around workplaces, buildings, and related structures. 5.2 This practice is applicable to the digestion of airborne dust and dust wipe samples collected in accordance with Test Method D4532 , Guide D6062 , Practice D7144 , or Guide E1370 for airborne dust, and Practices D6966 , D7296 , D7822 , or E1728/E1728M using wipes that may or may not conform to Specifications D7707 or E1792 . 5.2.1 This practice is applicable to the digestion of airborne dust sample filters that have been removed from their sampling cassettes which have been wiped to collect all dust adhering to the side walls and included in the hard-walled containers as part of the collected samples as in Guide D8358 . 5.2.2 This practice is applicable to the digestion of airborne dust samples that use acid-soluble cellulosic air sampling capsules with the entire contents of the cassettes transferred to hard-walled containers. 5.2.3 This practice is applicable to the digestion of settled dust samples collected using wipe materials in hard-walled containers. 5.3 Digestates prepared according to this practice are intended to be analyzed for metal and metalloid concentrations using spectrometric techniques such as inductively coupled plasma mass spectrometry (ICP-MS), inductively coupled plasma optical emission spectrometry (ICP-OES), graphite furnace atomic absorption spectrometry (GFAAS), and flame atomic absorption spectrometry (FAAS) (see Test Methods D4185 , D6785 , D7035 , D7439 , E1613 , E3193 , and E3203 ), or for lead using electrochemical techniques such as anodic stripping voltammetry (see Practice E2051 ), or for beryllium using optical fluorescence detection (see Test Method D7202 ). 5.4 Laboratories developing in-house test methods using this procedure shall determine precision and bias in accordance with the principles laid down by their accrediting agency.