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Infrared spectroscopy and spectroscopic imaging in forensic science
Andrew V Ewing1, Sergei G Kazarian1
1Department of Chemical Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK. s.kazarian@imperial.ac.uk.
The Analyst
|December 2, 2016
Summary
Infrared spectroscopy and spectroscopic imaging offer powerful, non-destructive chemical analysis for forensic science. These techniques reveal detailed composition of evidence like fingerprints, explosives, and counterfeit drugs.
Area of Science:
- Forensic Science
- Analytical Chemistry
- Spectroscopy
Background:
- Infrared spectroscopy and spectroscopic imaging are label-free, non-destructive analytical methods.
- These techniques offer high chemical specificity and sensitivity, crucial for forensic applications.
- Recent advancements focus on Fourier transform infrared (FT-IR) spectroscopic imaging.
Approach:
- This review discusses applications and recent developments of infrared spectroscopy and imaging in forensic science.
- It summarizes the use of FT-IR spectroscopic imaging in transmission, external reflection, and Attenuated Total Reflection (ATR) modes.
- The potential of these methods for analyzing various forensic samples is highlighted.
Key Points:
- Spectroscopic imaging provides chemical composition of fingermarks and contaminants at crime scenes.
- Research demonstrates potential for analyzing fingerprint residues, explosive materials, and counterfeit drugs.
- The review considers implications for examining diverse materials.
Conclusions:
- Infrared spectroscopy and imaging are valuable tools for forensic analysis.
- Future research avenues include broader applications of vibrational spectroscopy in forensic science.
- These techniques enhance the chemical analysis capabilities in forensic investigations.
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