infrared spectrophotometry


infrared spectrophotometry
(IR)
   An analytical technique which utilizes an instrument which passes infrared radiation through a sample or which bounces infrared radiation off the surface of a sample. A very sensitive heat detecting device measures the amount of infrared radiation absorbed as the wavelength of the radiation reaching the detector is changed. IR can give useful information about the type of compounds present in a sample, but it is not capable of precisely identifying a complex mixture. Infrared is very useful in identifying single solvent accelerants. Operates in the IR wavelength range. IR is employed by forensic scientists in the analysis of drugs, plastics, fibers, paint, and similar substances.

Forensic science glossary. . 2012.

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