1.1 本规程涵盖通过在指定静态区域扩散并随后在固体吸附剂上吸附的方式，对工作场所大气中是否存在某些气体或蒸汽进行采样 ( 1. ) . 2. 1.2 实施规程附录A1中给出了适用于固体吸附剂取样的有机化合物列表，其中吸附剂包含在空气通过的床中 D3686 . 扩散取样器可能适用于类似范围的化合物，但必须参考单个取样器制造商的文献进行确认。 1.3 扩散采样器的有效使用取决于实际实验室或现场验证的存在，或两者兼有。验证指南可从已发布的协议中获得 ( 2- 6. ) . 本规程不包括用于评估扩散采样器准确性或精密度的验证、确认或特定试验程序。 1.4 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。 1.5 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 美国职业安全与健康管理局（U.S.Occupational Safety and Health Administration）在标题29CFR 1910.1000中颁布的法规规定，工作场所空气中的某些有害气体和蒸汽的浓度不得超过特定值。 5.2 当与分析技术结合使用时，如试验方法中给出的有机化合物的分析技术 D3687 ，可以提供一种方法来确定适用法规（例如，标题29CFR 1910.1000）中许多危险气体和蒸汽的时间加权气载浓度以及其他。 5.3 应查阅制造商的文献，以获取可通过特定装置取样的化学品的适当列表。

1.1 This practice covers the sampling of workplace atmospheres for the presence of certain gases or vapors by means of diffusion across a specified quiescent region and subsequent sorption on a solid sorbent ( 1 ) . 2 1.2 A list of organic compounds which are applicable to solid sorbent sampling where the sorbent is contained in a bed through which air is passed is given in Annex A1 of Practice D3686 . Diffusive samplers may be applicable to a similar range of compounds but this must be confirmed by reference to the individual sampler manufacturer’s literature. 1.3 The valid use of diffusive samplers depends on the existence of actual laboratory or field validation, or both. Guidance on validation can be obtained from published protocols ( 2- 6 ) . This practice is not designed to cover the verification, validation, or specific test procedures used to assess the accuracy or precision of diffusive samplers. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 Regulations such as those promulgated by the U.S. Occupational Safety and Health Administration in Title 29CFR 1910.1000 designate that certain hazardous gases and vapors must not be present in the workplace air at concentrations above specific values. 5.2 This practice, when used in conjunction with an analytical technique, such as that given for organic compounds in Test Method D3687 , may provide a means for the determination of time-weighted airborne concentrations of many of the hazardous gases and vapors in applicable regulations (for example, Title 29CFR 1910.1000), as well as others. 5.3 The manufacturer’s literature should be consulted for the appropriate list of chemicals which may be sampled by a particular device.