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FRSC 2001 – Introduction to Forensic Science Technology II Professor Bensley Alfred State College.

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Presentation on theme: "FRSC 2001 – Introduction to Forensic Science Technology II Professor Bensley Alfred State College."— Presentation transcript:

1 FRSC 2001 – Introduction to Forensic Science Technology II Professor Bensley Alfred State College

2 Definitions Arson Arson Accelerants Combustion reactions (oxidation) Combustion reactions (oxidation) Exothermic reactions Exothermic reactions Heat of combustion Heat of combustion Flash point Flash point

3 At the Scene of a Fire

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5 Flashover VideoBackdraft Video

6 Submission of Evidence

7 Analytical Techniques Extraction – headspace or passive diffusion (static headspace) techniques Extraction – headspace or passive diffusion (static headspace) techniques Analysis – Gas Chromatography (FID or MS detectors) Analysis – Gas Chromatography (FID or MS detectors)

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9 Gasoline Chromatogram

10 Diesel Fuel Chromatogram

11 Explosive Analysis Low explosives – rate of deflagration Low explosives – rate of deflagration Examples – black powder, smokeless powder Examples – black powder, smokeless powder High explosives – rate of detonation High explosives – rate of detonation Examples – TNT, RDX, C-4, ANFO… Examples – TNT, RDX, C-4, ANFO…

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13

14 C4 Explosion Video

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16 Analysis of Explosive Evidence Microscopy Microscopy Thin Layer Chromatography Thin Layer Chromatography Color Tests (Griess for nitrites e.g.) Color Tests (Griess for nitrites e.g.) GC/MS – not widely GC/MS – not widelyused FTIR FTIR

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