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Significance and Use
4.1 This practice is useful for sampling fire debris to screen for the presence of ignitable liquid residues prior to extraction with other techniques. It is most appropriate for sampling light to medium range ignitable liquids (such as light oxygenates, lacquer thinners, and other similar volatile compounds or products), and less appropriate for sampling ignitable liquids that have compounds in the heavy range., ,
4.1.1 When sampled for screening purposes, the instrumentation typically utilized is a gas chromatograph with either a mass spectrometer (GC-MS, refer to Test Method ) or flame ionization detector (GC-FID).
4.2 This practice is generally less efficient at recovering limited quantities of ignitable liquids than Practices , , , and , particularly for higher boiling compounds.
4.3 The separation takes place in a closed container and the sample remains in approximately the same condition in which it was submitted. Since only a small aliquot of the sample headspace is removed for analysis, sample reanalysis may be possible.
4.4 High concentrations of highly volatile compounds can saturate the headspace, inhibiting the recovery of less volatile components and leading to the detection or identification of only the more volatile compounds in the sample.
4.5 This practice is intended for use in conjunction with other extraction techniques, such as those described in Practices , , , and , when analysis of a sample for all classes of ignitable liquids is required or desired.
Note 1: The headspace specimen (the portion in the syringe) is consumed in the analysis. Preserve an extract for potential reanalysis (see Practice ) using an alternative separation and concentration practice, such as those described in Practices , , and , if preservation is required per laboratory policies.
1.1 This practice describes the procedure for removing vapor from the headspace of a fire debris container for the purpose of detecting or identifying ignitable liquid residues.
1.2 Separation and concentration procedures are listed in the referenced documents. (See Practices , , , and .)
1.3 This practice offers a set of instructions for performing one or more specific operations. This standard cannot replace knowledge, skill, or ability acquired through appropriate education, training, and experience and should be used in conjunction with sound professional judgment.
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 and health 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
E1386 Practice for Separation of Ignitable Liquid Residues from Fire Debris Samples by Solvent Extraction
E1412 Practice for Separation of Ignitable Liquid Residues from Fire Debris Samples by Passive Headspace Concentration With Activated Charcoal
E1413 Practice for Separation of Ignitable Liquid Residues from Fire Debris Samples by Dynamic Headspace Concentration
E1459 Guide for Physical Evidence Labeling and Related Documentation
E1492 Practice for Receiving, Documenting, Storing, and Retrieving Evidence in a Forensic Science Laboratory
E1618 Test Method for Ignitable Liquid Residues in Extracts from Fire Debris Samples by Gas Chromatography-Mass Spectrometry
E2154 Practice for Separation and Concentration of Ignitable Liquid Residues from Fire Debris Samples by Passive Headspace Concentration with Solid Phase Microextraction (SPME)
E2451 Practice for Preserving Ignitable Liquids and Ignitable Liquid Residue Extracts from Fire Debris Samples
ICS Number Code 13.220.99 (Other standards related to fire protection)
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ASTM E1388-17, Standard Practice for Static Headspace Sampling of Vapors from Fire Debris Samples, ASTM International, West Conshohocken, PA, 2017, www.astm.orgBack to Top