OK, still trying to understand what you did here. Were did you get this .2 gram gold bead from?
Were there gold foils you were able to seperate from the pins?
If so, how did you seperate them? Just by rinsing?
I would say, especially with this bubbler, and the fact it seems little copper was disolved, that
a fair amount of your gold (percentage wise) from this little experiment, is still in the solution.