ASTM E1413-06
(Practice)Standard Practice for Separation and Concentration of Ignitable Liquid Residues from Fire Debris Samples by Dynamic Headspace Concentration
Standard Practice for Separation and Concentration of Ignitable Liquid Residues from Fire Debris Samples by Dynamic Headspace Concentration
SCOPE
1.1 This practice describes the procedure for separation of small quantities of ignitable liquid residues from fire debris samples using the absorption/elution method of headspace concentration.
1.2 Both positive and negative pressure systems are described.
1.3 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.
1.4 Alternate separation and concentration procedures are listed in Section 2.
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.
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Designation:E1413–06
Standard Practice for
Separation and Concentration of Ignitable Liquid Residues
from Fire Debris Samples by Dynamic Headspace
1
Concentration
This standard is issued under the fixed designation E 1413; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Summary of Practice
1.1 This practice describes the procedure for separation of 3.1 The sample, preferably in its original container, is
small quantities of ignitable liquid residues from fire debris heated, forcing volatile compounds to vaporize. At the same
samples using the absorption/elution method of headspace time, the headspace in the sample is drawn or pushed through
concentration. a tube containing activated charcoal which adsorbs the vapor-
1.2 Both positive and negative pressure systems are de- ized compounds.
scribed.
4. Significance and Use
1.3 Whilethispracticeissuitableforsuccessfullyextracting
4.1 This practice is useful for preparing extracts from fire
ignitable liquid residues over the entire range of concentration,
theheadspaceconcentrationmethodsarebestusedwhenahigh debris for later analysis by gas chromatography, GC/MS, or
GC/IR.
level of sensitivity is required due to a very low concentration
of ignitable liquid residues in the sample. 4.2 This is a very sensitive separation procedure, capable of
isolating quantities smaller than 0.1 µL of ignitable liquid
1.4 Alternate separation and concentration procedures are
listed in Section 2. residue from a sample.
4.2.1 Actual recovery will vary, depending on several fac-
1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the tors, including adsorption temperature, container size, and
competition from the sample matrix.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 4.3 “This is a potentially destructive technique.” Portions of
bility of regulatory limitations prior to use. the sample subjected to this procedure may not be suitable for
re-sampling. Therefore, a portion of the sample extract should
2. Referenced Documents
be saved for potential future analysis. Consider using passive
2
2.1 ASTM Standards: headspace concentration as described in Practice E 1412.
D 1193 Specification for Reagent Water
5. Apparatus
E 752 Practice for Safety and Health Regulations Relating
3
5.1 Positive Pressure Apparatus:
to Occupational Exposure to Carbon Disulfide
E 1387 Test Method for Ignitable Liquid Residues in Ex- 5.1.1 Sample Pressurization Device—A system capable of
delivering pressurized dry nitrogen (or other inert gas) at up to
tracts from Fire Debris Samples by Gas Chromatography
E 1412 Practice for Separation of Ignitable Liquid Residues 40 psi (276 kPa) to an orifice to be inserted into the bottom of
the sample container.
from Fire Debris Samples by Passive Headspace Concen-
tration With Activated Charcoal 5.1.1.1 A needle valve capable of fine control of the flow
rate of the dry nitrogen, at up to 1500 cc/min.
5.1.1.2 A flow meter capable of measuring the flow of dry
nitrogen through the end of the charcoal adsorption tube at the
1
This practice is under the jurisdiction of ASTM Committee E30 on Forensic
rate of 0 to 1500 cc/min.
Sciences and is the direct responsibility of Subcommittee E30.01 on Criminalistics.
5.1.1.3 Container Closure—A device suitable for sealing
Current edition approved June 1, 2006. Published August 2006. Originally
the container and directing the effluent nitrogen and vapors to
approved in 1991. Last previous edition approved in 2005 as E 1413 – 00(2005).
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
the charcoal tube.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.2 Negative Pressure Apparatus:
Standards volume information, refer to the standard’s Document Summary page on
5.2.1 Inlet and outlet system—A tube containing 1 cm of
the ASTM website.
3
charcoal is fitted into the lid of the original container with a
Withdrawn.
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E1413–06
sleeve stopper. This serves as a filter for incoming room air.A 7.1.1 Open and examine the fire debris sample in order to
vacuum is pulled on an adsorption tube also fitted into the lid determine that it is consistent with its description.
of the original container with a sleeve stopper.
7.1.1.1 Resolve any discrepancies between the submitting
5.2.2 Avacuu
...
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