Problem with Ore Processed with Aqua Regia

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bikshu

New member
Joined
Sep 28, 2017
Messages
1
Hello

Please I done recovery gold from some ores but i got brown colored precipitation from aqua regia solution before i precipitation i added urea than i will add sodium nitrite

please help me i do also sodium meta bisulfate but nothing precipitation occurred
 
Aqua regia isn't the best choice for ores normally as they contain many toxic elements.
You say you have a brown precipitate, when gold precipitates it frequently looks brown but did you test your solution using stannous chloride to determine whether you had any good in solution?
My advice is to do a lot more reading and studying before attempting any more processing, you could injure or even kill yourself.
 
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