Optoacoustic Spectroscopy.

Kinetic study of Maillard reactions in milk powder by photoacoustic spectroscopy

“…Photoacoustic spectroscopy has long been utilized to study the absorption of light by gases, but since recently has its use been extended to liquids and solids. Since its first application by Rosencwaig (1973) and other researchers (Harshbarger and Robin, 1973;Kaya et al, 1975) a number of papers covering the theoretical (Rosencwaig and Gersho, 1976; Afromowitz et al, 1977;McDonald and Wetsel, 1978;Wrobel and Vala, 1978) and experimental (Dewey, 1974;King and Kirkbright, 1976;Munroe and Reichard, 1977; Adams et al, 1977;Aamodt et al, 1977;Bard, 1978;Somoano, 1978;Blank and Wakefield, 1979) aspects of PAS have been published. To our knowledge, PAS has never been applied elsewhere to dairy products, a field where there is a real need for analytical instruments other than absorption ones, for direct, rapid, and precise measurements of opaque and light-scattering samples.…”