vehmently
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Silver Rhodium Separation
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vehmently
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Oops, wrong button. Anyone know a method to separate silver and rhodium ?
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CobaltChloride
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Literature seems to say that rhodium doesn't react with nitric acid, but silver definitely does. Soaking the piece in nitric acid should dissolve the
silver as silver nitrate, releasing NOx in the process and leave behind the rhodium. Problems may arise when your piece has a lot more rhodium than
silver because of the phenomenon explained in this video https://www.youtube.com/watch?v=aX4Iq11j2dI . Do you know the percentage of each metal in the piece?
[Edited on 21-4-2018 by CobaltChloride]
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vehmently
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Wouldnt nitric work ?
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aga
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That's what CobaltChloride said 30 minutes ago.
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vehmently
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Thanks for the replies. I was offline for a bit and miss f the post.the Rh content is fairly low on average but might get up to 25% by wgt
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CobaltChloride
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Then the method I described above should work.
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Fleaker
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I don't know how soluble rhodium is in silver, or vice versa. Check a phase diagram! I seem to recall fire assay on silver never recovers rhodium
well.
Neither flask nor beaker.
"Kid, you don't even know just what you don't know. "
--The Dark Lord Sauron
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