Firearm residue detection by instrumental neutron activation analysis

Area of Science:

• Forensic Science
• Analytical Chemistry
• Nuclear Techniques

Background:

• Traditional firearm discharge residue (FDR) detection methods often involve complex and time-consuming post-irradiation chemical procedures.
• Previous neutron activation analysis (NAA) techniques for FDR faced challenges with sample throughput and chemical processing.

Purpose of the Study:

• To develop and present an optimized neutron activation analysis (NAA) technique for enhanced firearm discharge residue (FDR) detection.
• To streamline the analysis process by removing cumbersome post-irradiation chemistry.
• To increase the efficiency and sample capacity of FDR analysis using NAA.

Main Methods:

• The study details an improved neutron activation analysis (NAA) protocol for firearm discharge residue (FDR).
• Key methodological advancements include the elimination of post-irradiation chemistry.
• Sample preparation was optimized to allow for the analysis of approximately 130 samples per irradiation capsule.

Main Results:

• The developed NAA technique significantly reduces analysis time by removing the need for post-irradiation chemistry.
• The optimized sample preparation allows for a higher sample throughput, accommodating up to 130 samples per capsule.
• This advancement offers a more efficient and practical approach to FDR detection.

Conclusions:

• The improved NAA technique represents a substantial advancement in firearm discharge residue (FDR) detection.
• Eliminating post-irradiation chemistry simplifies the process and enhances its applicability in forensic investigations.
• The increased sample capacity and reduced analysis time make this method highly valuable for forensic laboratories.