hi people,
May you please help me out.i used nitric acid to remove gold from circuit boards. i took the washed gold leaf and the inert power from the circuit boards and dissolved the gold in aqua regia, adding nitric acid, drop at a time, until the gold was gone. I then added some deionized water and filtered in through an buchner to loose the board powder. i let it settle and then tipped the clear solution off. when adding smb, i got a purple precipitate. A gold compound? does anyone recognize this mistake?
I was getting a white precipitate once, though i figured this to be excess nitric acid, burning smb? correct?
Any help would be massively appreciated. sorry if this is a repeat Q, though, i have been searching for a good while and cannot find it.
thanks
May you please help me out.i used nitric acid to remove gold from circuit boards. i took the washed gold leaf and the inert power from the circuit boards and dissolved the gold in aqua regia, adding nitric acid, drop at a time, until the gold was gone. I then added some deionized water and filtered in through an buchner to loose the board powder. i let it settle and then tipped the clear solution off. when adding smb, i got a purple precipitate. A gold compound? does anyone recognize this mistake?
I was getting a white precipitate once, though i figured this to be excess nitric acid, burning smb? correct?
Any help would be massively appreciated. sorry if this is a repeat Q, though, i have been searching for a good while and cannot find it.
thanks