Abstract
The nature of the atomic emission signal from graphite furnace atomic emission (GFAES) systems is investigated using computer simulations of atomization and diffusive removal. The emission signals are not collisionally generated for noble gases; excited states are created by absorption of continuum radiation, presumably from the tube walls. The time between the absorbance peak maximum and the emission peak maximum is a function almost solely of the diffusion coefficient of the analyte for a known temperature ramp. Evidence for redeposition can be derived by simulating published absorbance-emission peaks. Significant questions about the temperature dependence of diffusion remain. The position and nature of the emission peak may be a useful tool for diagnostic studies of the graphite furnace.
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