Article2015

Evaluation of Four Fingerprint Development Methods for Touch Chemistry Using Matrix‐Assisted Laser Desorption Ionization/Time‐of‐Flight Mass Spectrometry,

Kimberly A. Kaplan‐Sandquist · Marc A. LeBeau · Mark L. Miller

30 citations0/0 files storedJournal of Forensic Sciences

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Forensic Fingerprint Detection Methods Mass Spectrometry Techniques and Applications Forensic Toxicology and Drug Analysis

Abstract

Four preparation techniques for MALDI/TOF mass spectrometry were compared to determine the ability to gather intelligence for investigations through the chemical analysis of latent fingerprints, defined as "touch chemistry." Compatible fingerprint development processes used for identification along with new techniques are necessary to evaluate touch chemistry. Ten volunteers deposited fingerprints from solvent residues containing drugs and explosives onto microscope slides. The developers included (A) fingerprint powder, (B) MALDI matrix, (C) fingerprint powder and lifting, and (D) cyanoacrylate fuming with fingerprint powder. Qualitative identification was based on ion images and spectra. The highest average detection rates (88%) were found using methods A and B. Methods C (52%) or D (18%) had limited success. Results demonstrate the importance of imaging coupled to extracted mass spectral data in detecting analytes in deposited fingerprints. Overall, the results suggest continued development of touch chemistry applications could prove useful for gathering intelligence and forensically relevant information.

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References

2008Latent Fingerprint Chemical Imaging by Mass Spectrometry 2009Study of latent fingermarks by matrix‐assisted laser desorption/ionisation mass spectrometry imaging of endogenous lipids 2009Detection of drugs and their metabolites in dusted latent fingermarks by mass spectrometry 2010Multiplexed Detection of Metabolites of Narcotic Drugs from a Single Latent Fingermark 2012Detection of nitro-organic and peroxide explosives in latent fingermarks by DART- and SALDI-TOF-mass spectrometry 2009Detection of illicit substances in fingerprints by infrared spectral imaging 2011Two-Step Matrix Application for the Enhancement and Imaging of Latent Fingermarks 2009Infrared spectroscopic imaging of latent fingerprints and associated forensic evidence

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2019Simultaneous imaging of latent fingermarks and detection of analytes of forensic relevance by laser ablation direct analysis in real time imaging-mass spectrometry (LADI-MS)2018Molecular composition of fingermarks: Assessment of the intra- and inter-variability in a small group of donors using MALDI-MSI 2022Surface Analysis Techniques in Forensic Science: Successes, Challenges, and Opportunities for Operational Deployment 2018

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