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A hydride generation system in Atomic absorption spectroscopy is used to generate volatile hydrides of certain elements, such as arsenic, selenium, and tellurium. The volatile hydrides are then carried into the flame by a stream of inert gas, where they are atomized and excited. The excited atoms then emit light at specific wavelengths, which are detected by the spectrometer. The intensity of the emitted light is proportional to the concentration of the analyte in the sample.