¡°Swipe and Scan¡±: Integration of sampling and analysis of gunshot metal residues at screen-printed electrodes

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• 作者：Aoife M. O'Mahony ; Joshua R. Windmiller ; Izabela A. Samek ; Amay Jairaj B ; odkar ; Joseph Wang
• 关键词：Sensor strip ; Abrasive stripping voltammetry ; Gunshot residue ; Sampling
• 刊名：Electrochemistry Communications
• 出版年：2012
• 出版时间：September, 2012
• 年：2012
• 卷：23
• 期：Complete
• 页码：52-55
• 全文大小：620 K

文摘

Increasing security needs require field-deployable, on-the-spot detection tools for the rapid and reliable identification of gunshot residue (GSR), and thus the collection of GSR samples is a crucial step in forensic analysis. In this work we demonstrate a novel protocol integrating GSR sampling and electroanalysis using microfabricated carbon sensor-strips. The new integrated sampling/detection methodology relies on abrasive stripping voltammetry (AbrSV) involving an initial mechanical transfer of trace amounts of surface-confined GSR from the hand of a suspect directly onto the electrode contingent of the sensor strip, which is immediately ready for electrochemical analysis. The integrated sampling/detection method holds much promise as a portable, rapid and inexpensive system to promptly identify a subject who has discharged a firearm in various forensic scenarios.