A device used to screen objects for the presence of explosive residues is:

Question

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Ion-mobility spectrometry is a widely used technique for detecting and identifying explosives. It works by ionizing molecules in the sample and then measuring their mobility in an electric field. This allows for the identification of specific explosive compounds even in the presence of other substances. X-ray diffraction, mass spectrometry, thin-layer chromatography, and infrared spectrophotometry are all valuable analytical techniques, but they are less suited to the specific task of screening for explosive residues.

A Device Used to Screen Objects for the Presence of Explosive