Background emission in carbon furnace atomic-emission spectrometry

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Abstract
Investigations have shown that with careful optical design and alignment the continuous background emission signal from a carbon furnace can be reduced to a minimum. When no radiation from the furnace wall enters the monochromator directly, the background signal is a result of Rayleigh scattering of furnace-wall radiation by atoms or molecules in the vapour phase of the furnace. Methods for further reducing the continuous background signal, including optical and furnace design, are discussed.

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