I processed 115 Pentium 4 Socket 478 CPUs by:
- removing heatspreaders
- dissolving the base metals with AP
- dissolving the gold containing sludge in HCl/Cl
- dropping gold with SMB
I got 0,7 g of gold powder and equals a gold content of 0.006g/CPU. Since these chips are considered low yield, I'm not sure if this is good or bad ?
Problem: I'm nearly sure that there is no more gold in solution though the stannous test is still positive !
It is difficult to identify the colour because of a green solution, which originates from copper or nickel impurities I think.
Any hints?
- removing heatspreaders
- dissolving the base metals with AP
- dissolving the gold containing sludge in HCl/Cl
- dropping gold with SMB
I got 0,7 g of gold powder and equals a gold content of 0.006g/CPU. Since these chips are considered low yield, I'm not sure if this is good or bad ?
Problem: I'm nearly sure that there is no more gold in solution though the stannous test is still positive !
It is difficult to identify the colour because of a green solution, which originates from copper or nickel impurities I think.
Any hints?