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gold coper silver alloy problem

Lähetetty: Ti Huhti 24, 2018 15:00
Kirjoittaja kevinmanuel
HI,

I had a bead that compose of approx.70 percent copper and 15% silver and 5% gold
How can i seperate the gold ?If i piut the bead in 50/50 nitric acid the copper will dissolve
But will the silver dissolve too? Wont it be push out by the copper ions in the nitrate solution ?
Because of the electromotive series copper will push out/ cement the silver because they are in the same solution with
The copper, is there a way that copper and silver will be dissolve andleft the 5% gold
In the solution? .. i mean i only wanted the gold... kindly advise me what to do

Please help.

I didn't find the right solution from the Internet.

References:
http://www.goldrefiningforum.com/~goldr ... hp?t=19777
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Thanks!