Visualisation of amphetamine contamination in fingerprints using tof-sims technique
Małgorzata I. Szynkowska-Jóźwik (Lodz University of Technology)
Elżbieta Maćkiewicz (Lodz University of Technology)
Jacek Rogowski (Lodz University of Technology)
Magdalena Gajek (Lodz University of Technology)
Aleksandra Pawlaczyk (Lodz University of Technology)
Marcel de Puit (Nederlands Forensisch Instituut (NFI), Digital Technology and Biometrics, TU Delft - Applied Sciences)
Andrzej Parczewski (Jagiellonian University)
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Abstract
Time-of-flight secondary ion mass spectrometry (TOF-SIMS) was applied to detect traces of amphetamine on fingerprints. In the present study, three different lift tapes and latent powder fingerprints were tested. The obtained results show that it is possible to identify traces of a drug as well as its distribution over the tested fingerprint after its transfer from the primary base onto an adhesive lifter (secondary base). Moreover, images obtained by the TOF-SIMS technique enable the observation of very small areas of the analysed fingerprint as well as the identification of micro-objects (residues of a contaminant) that were left on the fingerprint. The use of the black latent fingerprint powder did not interfere with the TOF-SIMS analysis, which makes it possible to effectively use this technique to study the traces of substances on the revealed fingerprints.
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