1.1.This practice describes the procedure for separation of ignitable liquid residues from fire debris samples using the method of active headspace concentration onto an adsorbent tube, for subsequent solvent elution or thermal desorption. 1.2.Active headspace concentration onto an adsorbent tube takes place from a closed air-tight sample container (typically a jar, can, or bag), using a syringe or pump. 1.3.Active headspace concentration systems for adsorption onto an adsorbent tube are illustrated and described. 1.4.This practice is suitable for extracting ignitable liquid residues over a range of concentrations (L/L to mL/L). 1.5.This practice is more suitable than the static headspace method (Practice E1388) for extracting ignitable liquid residues when a (very) low concentration of ignitable liquids (less than 10 L/L, see Practice E1388) is expected in the sample. 1.6.The principle of this practice is similar to the principle of the dynamic headspace concentration method (Practice E1413), but potentially less sensitive and non-destructive because only a single volume of the headspace from a sample container is sampled. 1.7.Alternative headspace concentration methods are listed in the referenced documents Section 2 (see Practices E1388, E1412, E1413 and E2154).
This method is widely used in Europe, but is not adequately addressed in the current E1413.
Keywordsactivated carbon; active headspace concentration; elution; fire debris samples; forensic science; ignitable liquid residues; Tenax TA; thermal desorption; gas chromatography-mass spectrometry
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
Draft Under Development