Infrared Laser Ablation with Vacuum Capture for Fingermark Sampling
© 2017, American Society for Mass Spectrometry. Infrared laser ablation coupled to vacuum capture was employed to collect material from fingermarks deposited on surfaces of different porosity and roughness. Laser ablation at 3 μm was performed in reflection mode with subsequent capture of the ejecta with a filter connected to vacuum. Ablation and capture of standards from fingermarks was demonstrated on glass, plastic, aluminum, and cardboard surfaces. Using matrix assisted laser desorption ionization (MALDI), it was possible to detect caffeine after spiking with amounts as low as 1 ng. MALDI detection of condom lubricants and detection of antibacterial peptides from an antiseptic cream was demonstrated. Detection of explosives from fingermarks left on plastic surfaces as well as from direct deposition on the same surface using gas chromatography mass spectrometry (GC-MS) was shown. [Figure not available: see fulltext.].
Publication Source (Journal or Book title)
Journal of the American Society for Mass Spectrometry
Donnarumma, F., Camp, E., Cao, F., & Murray, K. (2017). Infrared Laser Ablation with Vacuum Capture for Fingermark Sampling. Journal of the American Society for Mass Spectrometry, 28 (9), 1958-1964. https://doi.org/10.1007/s13361-017-1703-2