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Precipitate pt and pd from aqua regia solution

Hello friends , I have aproblem with precipitating pt and pd from an aqua regia solution that I made from an ore near by ,

It is giving a colored indication of stannus chloride test so I didn't found any precipitation of au with sadium metabisupfite , so I tested with pt and pd precipitation . I did adding aluminium foil . So I ve got a brownish color powder precipitation ,

Can any one please guide me on this situation .

Thank you and good day

119 comments

119 Comments

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Precipitate pt and pd from aqua regia solution

Gold-N-Scrap

Recovery & Refining of Precious Metals