ASTM E2451-13 Standard Practice for Preserving Ignitable Liquids and Ignitable Liquid Residue Extracts from Fire Debris Samples

从火灾碎片样品中保存可燃液体和可燃液体残留物提取物的标准操作

基本信息

标准号

ASTM E2451-13

标准状态

历史

发布单位或类别

美国-美国材料与试验协会(US-ASTM);

发布日期

实施日期

废止日期

CCS分类

ICS分类

13.220.40 消防 - 材料和制品的可燃性和燃烧性能

研制信息

起草单位

- 展开▼

起草人

归口单位

E30.01

摘要

1.1 This practice describes procedures for preserving residues of ignitable liquids in extracts obtained from fire debris samples and questioned ignitable liquid samples. Extraction procedures are described in the Referenced Documents.1.2 This practice does not attempt to address all the issues regarding the short-term or long-term storage of ignitable liquid samples and ignitable liquid extracts from fire debris samples. The changes that may occur under various storage conditions have not been fully documented.1.3 This practice cannot replace knowledge, skill, or ability acquired through appropriate education, training, and experience and should be used in conjunction with sound professional judgment.1.4This 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 and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ======4.1 The archiving of extracts recovered from fire debris or liquids submitted in a fire investigation provides a mechanism to preserve extracts and liquids for reanalysis in the event that sample loss, sample degradation, or failure of the fire debris container occurs during post-analysis storage of fire debris evidence.4.2 The nature of some extraction procedures, which may preclude reanalysis, is considered.4.3 Changes to a preserved sample extract and the length of time it remains viable under storage conditions are unknown.4.4 The concentration and composition of the ignitable liquid residue or the use of an alternate extraction/concentration technique used to preserve a sample extract of the fire debris sample may result in different findings between the analysis of the preserved sample and the original analysis. 1.1本实施规程描述了从火灾碎片样品和可疑可燃液体样品中获得的提取物中保存可燃液体残留物的程序。参考文件中描述了提取程序。1.2本规程并不试图解决与易燃液体样品和火灾碎片样品中易燃液体提取物的短期或长期储存有关的所有问题。各种储存条件下可能发生的变化尚未完全记录。1.3本实践不能取代通过适当教育、培训和经验获得的知识、技能或能力，应与良好的专业判断结合使用。1.4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和健康实践，并确定监管限制的适用性。====意义和用途======4.1从火灾调查中提交的火灾碎片或液体中回收的提取物的归档提供了一种机制，以在分析后存储火灾碎片证据期间发生样品丢失、样品降解或火灾碎片容器故障时，保存提取物和液体以供重新分析。4.2考虑了一些提取程序的性质，这些程序可能会妨碍再分析。4.3保存的样品提取物的变化及其在储存条件下保持有效的时间未知。4.4可燃液体残留物的浓度和成分，或使用替代提取/浓缩技术来保存火灾碎片样本的样本提取物，可能会导致保存样本的分析结果与原始分析结果不同。展开▼

关联标准

代替如下标准

1.ASTM E2451-08 Standard Practice for Preserving Ignitable Liquids and Ignitable Liquid Residue Extracts from Fire Debris Samples。

被如下标准代替

1. ASTM E2451-21 Standard Practice for Preserving Ignitable Liquids and Ignitable Liquid Residue Extracts from Fire Debris Samples。

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