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Gold/Mining/Energy : Desert Dirts, Gold & Platinum, the emperors new clothes
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To: Tim Hall who wrote (1430)5/23/1998 10:07:00 AM
From: Aurum  Read Replies (2) of 1913
 
I haven't read all the relevant posts, but, one simple exercise would be to ask about the final "bead" obtained after cupelling. If there is no "bead", there is no gold+PGM content. Sure, separating them is involved, but there are instrumental techniques available now that can do this almost routinely (such as ICP-ES or ICP-MS). The "bead" should contain all the gold and at least some (usually all) of the PGMs, iridium included. Some PGMs are almost insoluble in molten gold (ie. don't significantly alloy) and will form a scum on the gold bead.
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