FT-IR Photoacoustic Spectroscopy
نویسندگان
چکیده
منابع مشابه
Quantitative depth profile analysis of micrometer-thick multilayered thin coatings using step-scan FT-IR photoacoustic spectroscopy.
This paper demonstrates the results of the comparison of step-scan FT-IR photoacoustic spectroscopy with other established spectroscopic and microscopic techniques in the quantitative depth profile determination of micrometer- and submicrometer-thick multilayered thin coatings. The power of the phase rotation and phase spectrum analytical methods to clearly distinguish the infrared signature of...
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In the present study, hardwood and softwood pulps were characterized by employing Fourier transform infrared photoacoustic spectroscopy (FT-IR-PAS). The pulp samples examined originated from Swedish sulfite and kraft pulp mills, which utilize different cooking processes and modern bleaching technologies. Partial least-squares (PLS) analysis was used to correlate the spectral data obtained with ...
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Recent developments in FT—IR sampling techniques such as diffuse reflectance and photoacoustic spectroscopy are known to obtain new and novel information on solid polymers. In particular, depth profiling can be obtained from the surface using a potassium bromide overlayer. Photoacoustic spectroscopy using coupling gases with different polarizability allows one to determine the nature of absorbe...
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Applications of photoacousticlphotothermal (PAIFT) detection to molecular spectroscopy are reviewed with special emphasis on the use of step-scan Fourier transform infrared (FT-IR) PA spectroscopy for chemical analysis and for spectral depth profiling of laminar and other heterogeneous materials, particularly by use of the phase of the PA signal. Examples are drawn from recent work in our labor...
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www.spec t roscopyon l i ne . com T he concept of step-scan mid-infrared inter ferometr y dates back to the 1960s when the first optoelectronically controlled step-scan interferometer was reported (1). In contrast to the linear change of the optical path difference (retardation) in a conventional continuous-scan interferometer, the retardation changes stepwise in a step -scan Fourier transform–...
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