1.1 本试验方法描述了在装有活性炭的取样管中从空气中吸附的有机蒸汽的萃取和气相色谱测定。 1.2 该测试方法是对实践的补充 D3686 . 1.3 本试验方法适用于分析从工作场所或其他大气中采集的样品，前提是污染物吸附在木炭上，可以从木炭中充分提取，并且可以通过气相色谱（GC）进行分析。实践中介绍了其他吸附剂和其他萃取技术 D6196 . 1.4 在分析过程中，多组分样品的有机化合物可能相互干扰。第节给出了解决干扰的方法 6. . 1.5 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。 1.6 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。 具体预防措施见 8.5 , 9.2 ，和 X1.2.3 . 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 美国联邦职业安全与健康管理局（OSHA）在29 CFR 1910中的发布规定，某些有机化合物在工作场所大气中的浓度不得高于规定值。 5.2 当与实践结合使用时，本试验方法 D3686 ，将提高许多有机化学品气载浓度测定所需的准确性和精密度，包括但不限于29 CFR 1910、CDC-99-74-45、NIOSH分析方法手册、OSHA采样和分析方法以及用于测定危险物质的HSE方法。只要使用了适当的采样周期，它可以用于确定工人接触这些化学品的情况。 5.3 大多数实验室配备的仪器与第节中描述的类似 7. . 当采用适用于该设备的分析程序时，可以使用其他仪器。第节中描述的分析技术（或其变体） 9 – 11 通常用于分析从木炭中提取的挥发性有机化合物。在适当的情况下，可以使用其他程序，并验证其是否适合预期用途。

1.1 This test method describes the extraction and gas chromatographic determination of organic vapors that have been adsorbed from air in sampling tubes packed with activated charcoal. 1.2 This test method is complementary to Practice D3686 . 1.3 This test method is applicable for analysis of samples taken from workplace or other atmospheres provided that the contaminant adsorbs onto charcoal, that it can be adequately extracted from the charcoal, and that it can be analyzed by gas chromatography (GC). Other adsorbents and other extraction techniques are described in Practice D6196 . 1.4 Organic compounds of multicomponent samples may mutually interfere during analysis. Methods to resolve interferences are given in Section 6 . 1.5 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. 1.6 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. Specific precautions are given in 8.5 , 9.2 , and in X1.2.3 . 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 Promulgations by the U.S. Federal Occupational Safety and Health Administration (OSHA) in 29 CFR 1910 designate that certain organic compounds must not be present in workplace atmospheres at concentrations above specified values. 5.2 This test method, when used in conjunction with Practice D3686 , will promote needed accuracy and precision in the determination of airborne concentrations of many of the organic chemicals including but not limited to 29 CFR 1910, CDC-99-74-45, NIOSH Manual of Analytical Methods, OSHA Sampling and Analytical Methods, and HSE Methods for the Determination of Hazardous Substances. It can be used to determine worker exposures to these chemicals, provided appropriate sampling periods are used. 5.3 Most laboratories are equipped with apparatus similar to that described in Section 7 . Other apparatus can be used when analytical procedures suitable for that equipment are employed. The analytical techniques (or variations thereof) described in Sections 9 – 11 are in general use to analyze volatile organic compounds extracted from charcoal. Other procedures can be used when appropriate and validated as being suitable for the intended use.