Forensic chemists may use the “Fourier transform” variety of a technique named for this regime to identify drugs. For 10 points each:
[10m] Name this regime of the electromagnetic spectrum. A hydroxyl group exhibits a broad peak around 3300 inverse centimeters in a form of spectroscopy named for this regime of wavelengths.
ANSWER: infrared [or IR; accept Fourier transform infrared spectroscopy or FTIR spectroscopy; accept near-infrared or near-IR; accept mid-infrared or mid-IR; accept far-infrared or far-IR]
[10e] Another technique used by forensic chemists is mass spectrometry, which analyzes compounds by their ratio of mass to this quantity. Ionizing an atom gives it a non-zero value for this quantity, which is measured in coulombs.
ANSWER: electric charge [accept mass-to-charge ratio]
[10h] A gold standard in forensic analysis is the combination of mass spectrometry with this other technique. This technique incorporates a flame ionization detector and a purge-and-trap system to remove volatile chemicals.
ANSWER: gas chromatography [or GC; or vapor-phase chromatography or VPC; or gas-liquid partition chromatography or GLPC; accept gas chromatography-mass spectrometry or GC-MS; prompt on chromatography]
<Edinburgh A, Chemistry>