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Flame Atomic Absorption Spectrophotometry (FAAS) and Flame Atomic Emission Spectrophotometry (FAES) are widely used analytical techniques in chemistry for the quantitative determination of metals, but they differ significantly in instrumentation and working principle. In FAAS, the instrument primarily consists of a hollow cathode lamp specific to the element of interest, a nebulizer to convert the liquid sample into an aerosol, a burner or flame for atomization, a monochromator to _______ _______ ___ _____ ________ _________ _____ ____ ________ _______ ___.
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