PhotoacousticsPhotoacousticsThe photoacoustic effect was discovered by Alexander Graham Bell in 1880 during his research to develop the photophone, a device that communicated via light waves. Practical use of the photoacoustic effect has taken approximately a hundred years to develop to the point of great utility.
Major advantage of the photoacoustic effect is the fact that sensitivity is basically not dependent on the optical path length. This allows high sensitivity from short apsorbtion path length and highly linear concentration response over a wide dynamic measurement range from very low sample volumes. Photoacoustic spectroscopy (PAS) is now a commonly used method for analysis of solid, semi-solid, liquid, and gas samples.
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