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Fluorescence spectrophotometry is an analytical technique based on the measurement of fluorescence emitted by a substance after it absorbs light of a specific wavelength. The basic instrument consists of a light source, excitation monochromator, sample holder, emission monochromator, detector, and signal processor. Commonly used light sources include xenon arc lamps or mercury vapor lamps, which provide intense radiation over a wide range of ____ ______ _______ _________ ____ ______.
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