Abstract
A photothermal Fourier transform spectrometer built to accommodate a beam deflection detection system is described. The instrument, which can also function as conventional absorption FT spectrometer, and also a conventional FT photoacoustic spectrometer, covers the 3950−450 cm −1 range. With quantities of l mg of powdered organic or inorganic material, infrared spectra of high quality can be obtained in minutes. Sample cells are not needed, and sample preparation is not required. The surface of truly massive objects may be examined, and surface studies may be carried out under rigorously controlled conditions.
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