stripper solution

[seawolf]

I posted the other day about gold stripper cell and got great help, thanks again. The rinse water is an emerald green.
Is this normal or do I have base metals in the sulfuric acid?
If I do will I need to drop the metals?
Before or after re-concentrating the acid?
What will I need to use to drop the base metals?
Thanks in advance for the help.
Mark

 

[lazersteve]

Here's the clean up process for the black powder:

Black Powder from the Cell

The liquid will always have some base metals in it. They can be plated out by reversing the positive and negative leads and using a lead bar for the positive and a stainless steel plate for the negative. The base metals will plate out on the negative lead.

Steve

 

[seawolf]

Thank You, I will reduce the acid and do this. I was not sure if the base metals would interfere with the cell.
Mark