photoacoustic spectroscopy


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photoacoustic spectroscopy

[¦fōd·ō·ə¦kü·stik spek′träs·kə·pē]
(spectroscopy)
A spectroscopic technique for investigating solid and semisolid materials, in which the sample is placed in a closed chamber filled with a gas such as air and illuminated with monochromatic radiation of any desired wavelength, with intensity modulated at some suitable acoustic frequency; absorption of radiation results in a periodic heat flow from the sample, which generates sound that is detected by a sensitive microphone attached to the chamber. Abbreviated PAS. Also known as optoacoustic spectroscopy.
References in periodicals archive ?
(22) McClelland, J.E., Jones, R.W., and Bajic, S.J., "Photoacoustic Spectroscopy," in Handbook of Vibrational Spectroscopy, Vol.
Infrared-laser photoacoustic spectroscopy. Infrared Phys 1989;29:805-14.
Determination of melanin in human hair by photoacoustic spectroscopy. Anal Biochem 1997;254:267-71.
Photoacoustic spectroscopy, based on the photoacoustic effect which was first discovered by Alexander Graham Bell in 1880 [5], is a sensitive, selective, and well-established method for sensing trace gases that has been successfully employed in numerous applications [6, 7].
Patel, "Laser photoacoustic spectroscopy helps fight terrorism: high sensitivity detection of chemical Warfare Agent and explosives," European Physical Journal Special Topics, vol.
The Photoacoustic Spectroscopy (PAS) System for Remote Detection of Explosives and Chemicals, developed by Argonne National Laboratory, Argonne, Ill., addresses the need to detect chemicals and explosives from a distance.
Eyring, "Fourier transform infrared photoacoustic spectroscopy in thin-layer chromatography," Analytical Chemistry, vol.
Photoacoustics and photoacoustic spectroscopy. New York: John Wiley, 1980.