Platinum purification issues

[Platdigger]

Copper needs an oxidizer.

The strong stir brought in oxygen from the air.

 

[Lou]

If you are doing this professionally you need to not use copper.

And yes, high agitation means O2 introduced into solution which means high ORP not low ORP as copper is fairly noble.

 

[Lino1406]

I agree with Lou that treating such concentrations unprofessionally is useless. Taking 1 mg as the limit for viewing in my experience copper foil and of course air by stirring may help visually, if there's something above 1mg there it will show by coloring the foil

 

[yacht252002]

Thanks, Platdigger, Lou, and Lino, that makes sense.

 

[zacchy]

Well, I have not tried copper cementation yet, but it occurs to me, if copper powder is required as fine as you say, it may be better to obtain it from copper sulfate, and it is applied to mother liquors that have pgm.