Standard Practice for Preserving Ignitable Liquids and Ignitable Liquid Residue Extracts from Fire Debris Samples

Importancia y uso:

5.1 The preservation and storage of extracts recovered from fire debris or liquids submitted in a fire investigation provides a mechanism for reanalysis in the event that the original evidence is altered due to factors such as the extraction process (Practices E1386 and E1413), sample degradation, or failure of the original evidence container during post-analysis storage.

5.2 Reanalysis of a stored sample extract could result in data that do not duplicate the data obtained during the initial analysis. Loss of the more volatile components of a stored sample can occur, and this possibility should be considered when interpreting data from a stored sample. Studies of gasoline and diesel show that results (that is, determination of presence and classification of an ignitable liquid, or determination of absence of an ignitable liquid) obtained from reanalysis data are in agreement with the initial analytical results. (1-4)

5.3 Preserved extracts are either returned to the submitter for storage or catalogued and stored by the laboratory or other designee.

Subcomité:

E30.13

Referida por:

E1618-19, E1386-23, E1412-19, E3189-19, F0561-19, E1413-19, E2997-16, E3245-20E01, E2881-18

Volúmen:

14.02

Número ICS:

13.220.40 (Ignitability and burning behaviour of materials and products)

Palabras clave:

analysis; extract preservation; fire debris; forensic science; ignitable liquid residue; preservation; sample extract; sample preservation; storage ;