Abstract
The effect of selective excitation of gold atoms in a nonequilibrium oxygen plasma of a combined glow discharge (CGD) has been revealed. When working with alumina oxide as a matrix where the content of aluminum is about 30 wt.%, the atomic lines of Al are not seen at all in the CGD spectrum. But the atomic lines of gold have a very high intensity. Even when the aluminum and gold atomic lines overlap, gold can be detected at a content of 10−7%. This effect has been registered both in synthetic and natural ore samples.
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Lyubochko, V.A. Effect of Selective Excitation of Gold Atoms in a Nonequilibrium Oxygen Plasma of a Combined Glow Discharge. Journal of Applied Spectroscopy 70, 486–488 (2003). https://doi.org/10.1023/A:1025166413093
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DOI: https://doi.org/10.1023/A:1025166413093