Determination of the postexplosion residues of nitro group containing explosives in soil with GC-MS and GC-TEA

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2007

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Dursun, Hayrettin

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There is an increase in bombing assaults in recent years in our country. Determining the explosive material used in these cases by the quick and correct analysis of the evidence obtained after the explosions, is an important starting point for the investigations which are done to reach the perpetrators. The forensic chemistry investigations have to be correct, exact and rapid in order to reach the right criminal. In this study, the Gas Chromatography-Mass Spectrometry (GC-MS) and Gas Chromatography-Thermal Energy Analyser (GC-TEA) methods which are being used for the determination of the explosive materials’ residues used in bombing attacks are optimized with the standard solutions of 2,4,6-Trinitrotoluene (TNT) and 1,3,5-trinitro-1,3,5-triazocyclohexane (RDX) and standard mixture solution. The two methods were compared by analysing the postexplosion soil samples. Also an efficient and applicable sample preparation procedure was developed. The results showed that both methods are efficient and sensitive for the postexplosion investigations. It is seen that GC-TEA has lower detection limit and simple chromatograms due to its selectivity against only nitro group containing explosives. However it is concluded that there is a need for a reliable and sensitive method like GC-MS which provides identification and library search, for the determination of the organic components which can not be identified with GC-TEA

Subject Keywords

Analytical Chemistry.

URI

http://etd.lib.metu.edu.tr/upload/2/12609014/index.pdf
https://hdl.handle.net/11511/17337

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

H. Dursun, “Determination of the postexplosion residues of nitro group containing explosives in soil with GC-MS and GC-TEA,” M.S. - Master of Science, Middle East Technical University, 2007.