Hi friends
I have dissolved some ore by pyrometallurgical process followed by resulting a hydrochloric acid solution containing Pt and Pd analysed and detected by atomic absorption, along with many other base metals like Fe, Co, Mn, Cu, Ni, etc. so, when I try to cement Pt and Pd by copper wire from my orange colored acidic solution, a very black solution is appeared as if I have dropped black ink inside the solution and even after a week, no detectable black precipitate but a black solution is observable, and a white precipitate is gathered at the bottom of the solution.
1-What should be this very black color, which seems not to be filterable as a distinct black precipitate?
2-Is this a colloidal Pt, Pd, or even any other PGMs like Rhodium (which I saw in a paper indicated that Rh could be precipitated from acidic solution by Cu powder as a black precipitate)?
Any comments will be appreciated.
Nahan.
I have dissolved some ore by pyrometallurgical process followed by resulting a hydrochloric acid solution containing Pt and Pd analysed and detected by atomic absorption, along with many other base metals like Fe, Co, Mn, Cu, Ni, etc. so, when I try to cement Pt and Pd by copper wire from my orange colored acidic solution, a very black solution is appeared as if I have dropped black ink inside the solution and even after a week, no detectable black precipitate but a black solution is observable, and a white precipitate is gathered at the bottom of the solution.
1-What should be this very black color, which seems not to be filterable as a distinct black precipitate?
2-Is this a colloidal Pt, Pd, or even any other PGMs like Rhodium (which I saw in a paper indicated that Rh could be precipitated from acidic solution by Cu powder as a black precipitate)?
Any comments will be appreciated.
Nahan.