Determination of explosives and gunshot residue (GSR)is critical to violence and terrorism investigations that are associated withbombs and firearms usage. Traditional methods for explosives and GSR analysis arebased on liquid-liquid extraction, and solid phase extraction (SPE) followed byGC (gas chromatography) and LC (liquid chromatography) analysis. These samplepreparation techniques, however, require many steps and increase analysis time.A simple and reliable technique capable of performing extraction,concentration, and analysis is desirable for use in the forensic laboratory.Presented here is a fairly new SPE method usingdisposable pipette tip extraction (DPX). Extraction of explosives and GSR usingthis technique achieved a sample preparation throughput on the order of a fewminutes. The developed method exhibited an overall recovery of 80-100% for allof the studied compounds, with relative standard deviations of the recoveriesbelow 10%, which indicates a good accuracy and precision of the proposedmethod.

Determination of trace level high explosives and gunshot residue (GSR) using disposable pipette extraction (DPX) followed by high performance liquid chromatography (HPLC) and liquid chromatography/mass spectrometry (LC/MS) analysis

241st National Meeting (2011)

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