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CUPELLATION - 2 reference results
cupellation

Separation of gold or silver from impurities by melting the impure metal in a cupel (a flat, porous dish made of a refractory material) and directing a blast of hot air on it in a special furnace. The impurities, including lead, copper, tin, and other unwanted metals, are oxidized and partly vaporized and partly absorbed into the pores of the cupel.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
cupellation
Jan 01, 2004; cupellation A method of separating noble metals (e.g. gold or silver) from base metals (e.g. lead) by melting the mixture with a...
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Analysis of jewellery and precious metals using X-ray fluorescence.(JEWELLERY)
Nov 01, 2008; When considering that more than 80% of the global gold production is processed in the jewellery industry, then for economic and...
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Data on microchemical research published by researchers at University of Valencia.
Jan 16, 2009; According to a study from Valencia, Spain, An Iberian archaeological site located in the east of Spain is one of the most...
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Lead production and its atmospheric legacy
Jul 01, 1996; The oldest known artifact of smelted lead is a necklace discovered at an ancient city site in Anatolia. Its lead beads were...
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Precious metal analysis. (Materials).
Feb 01, 2003; X-ray XDAL and XAN fluorescence spectrometers provide a fast, non-destructive and precise determination of the alloy components...
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