1.1 本规程描述了使用吸附材料从样品上方的静态顶空中提取残渣，然后用溶剂洗脱吸附剂，从火灾碎片样品中分离少量可燃液体残渣的程序。 1.2 虽然本规程适用于在整个浓度范围内成功提取可燃液体残留物，但由于样品中可燃液体残留物的浓度非常低，因此需要高灵敏度时，最好使用顶空浓缩方法。 1.2.1 与其他分离和浓缩方法不同，这种做法基本上是无损的。 1.3 参考文件中列出了替代分离和浓缩程序（见实践 E1386 , E1388 , E1413 和 E2154 ). 1.4 这种做法不能取代知识、技能、能力、经验、教育或培训，应与专业判断结合使用。 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====== 4.1 本规程有助于从火灾碎片中制备提取物，以便稍后通过气相色谱-质谱法进行分析。 4.2 这是一种非常敏感的分离程序，能够分离出小于 1. / 10 μL样品中的可燃液体残留物。

1.1 This practice describes the procedure for separation of small quantities of ignitable liquid residues from samples of fire debris using an adsorbent material to extract the residue from the static headspace above the sample, then eluting the adsorbent with a solvent. 1.2 While this practice is suitable for successfully extracting ignitable liquid residues over the entire range of concentration, the headspace concentration methods are best used when a high level of sensitivity is required due to a very low concentration of ignitable liquid residues in the sample. 1.2.1 Unlike other methods of separation and concentration, this practice is essentially nondestructive. 1.3 Alternate separation and concentration procedures are listed in the referenced documents (see Practices E1386 , E1388 , E1413 , and E2154 ). 1.4 This practice does not replace knowledge, skill, ability, experience, education, or training and should be used in conjunction with professional judgment. 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 ====== 4.1 This practice is useful for preparing extracts from fire debris for later analysis by gas chromatography mass spectrometry. 4.2 This is a very sensitive separation procedure, capable of isolating quantities smaller than 1 / 10 μL of ignitable liquid residue from a sample.