Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1217, Issue 46, Pages 7183-7188Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2010.09.012
Keywords
Solid phase micro extraction (SPME); Organic gun shot residue (OGSR); Propellant powder; Forensic science; Firearms
Funding
- VC Bursary Scheme
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This work describes the evaluation of various solid phase micro-extraction (SPME) fibre types for the detection of compounds originating from particles of unburned propellant powders These compounds may also be found in association with organic gunshot residues (OGSR) Seven SPME fibres were assessed based on their ability to extract the compounds of interest (diphenylamine (DPA) 4-nitrodiphenylamine (4-NDPA) ethyl centralite (EC) nitroglycerin (NG) and dibutyl phthalate (DBP)) from four ammunition types across three calibres (9 mm 5 56 mm and 7 62 mm) Extracts were analysed by gas chromatography/mass spectrometry (GC/MS) Results indicated that the 65 mu m polydimethylsiloxane/divinylbenzene (PDMS/DVB) was the most suitable fibre type for the extraction of these compounds across the ammunition types tested Optimal extraction time parameters were also assessed with a 35-min period determined to be suitable A number of previously unreported considerations for extracting propellant powders and potentially OGSR related materials are discussed (C) 2010 Elsevier B V All rights reserved
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