1.1 本规程涵盖了使用干擦拭取样法或同时使用干擦拭取样法在表面收集含铍和铍化合物的沉降粉尘。这些样品的收集方式将允许随后使用原子光谱法或荧光检测等实验室分析技术提取和测定擦拭布中的铍和化合物。 1.2 本规程的适用范围仅限于湿擦拭取样（使用规程 D6966 )或真空取样（使用实践 D7144 )物理上不可行（例如，如果要擦拭的表面会因使用湿巾而受损）。 1.3 本规程不涉及用于清除、危险评估、风险评估和其他目的的采样设计标准（即，包括样本数量和位置的采样计划）。为了得出有效结论，应按照抽样计划的指示获得足够数量的样本。 指南中提供了其他指南 D7659 . 1.4 本规程包含解释性注释，不属于本规程强制性要求的一部分。 1.5 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。 1.6 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。 1.7 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 本规程旨在收集沉降粉尘样品，以便随后测量铍和化合物。本规程旨在用于收集沉降粉尘样品，这些样品对清除、危险评估、风险评估和其他目的有意义。 5.2 本规程仅用于从坚硬、相对光滑的无孔表面收集沉降粉尘样品，这些表面可能会受到水或其他润湿剂的影响，因此不适合使用规程进行湿擦拭取样 D6966 或使用实践进行微真空采样 D7144 . 由于与湿擦拭或微真空采样相比，干擦拭采样的收集效率有限且可变性高，因此不鼓励将本规程用于预期目的以外的任何目的。 3. 5.3 这种做法对于从粗糙混凝土、砌砖、纹理天花板和软纤维表面（如软垫和地毯）等具有实质纹理的表面收集沉降灰尘样本的效果较差。 微真空采样使用规程 D7144 可能更适合这些表面。

1.1 This practice covers the collection of settled dust containing beryllium and beryllium compounds on surfaces using the dry wipe sampling method, or both. These samples are collected in a manner that will permit subsequent extraction and determination of beryllium and compounds in the wipes using laboratory analysis techniques such as atomic spectrometry or fluorescence detection. 1.2 This practice is limited in its scope to applications where wetted wipe sampling (using Practice D6966 ) or vacuum sampling (using Practice D7144 ) is not physically feasible (for example, if the surface to be wiped would be compromised by use of wetted wipes). 1.3 This practice does not address the sampling design criteria (that is, sampling plan which includes the number and location of samples) that are used for clearance, hazard evaluation, risk assessment, and other purposes. To provide for valid conclusions, sufficient numbers of samples should be obtained as directed by a sampling plan. Additional guidance is provided in Guide D7659 . 1.4 This practice contains notes that are explanatory and are not part of the mandatory requirements of this practice. 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.6 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. 1.7 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 collection of settled dust samples for the subsequent measurement of beryllium and compounds. The practice is meant for use in the collection of settled dust samples that are of interest in clearance, hazard evaluation, risk assessment, and other purposes. 5.2 This practice is intended solely for the collection of settled dust samples from hard, relatively smooth nonporous surfaces that may be compromised by water or other wetting agents and that are therefore not suitable for wet wipe sampling using Practice D6966 or micro-vacuum sampling using Practice D7144 . Use of this practice for any purpose other than the intended purpose is discouraged due to the limited collection efficiency and high variability of dry wipe sampling as compared to wetted wipe or micro-vacuum sampling. 3 5.3 This practice is less effective for collecting settled dust samples from surfaces with substantial texture such as rough concrete, brickwork, textured ceilings, and soft fibrous surfaces such as upholstery and carpeting. Micro-vacuum sampling using Practice D7144 may be more suitable for these surfaces.