Yellow and black solution after adding dmg

[Jeff0172]

Hello i need some insight i refined some silver and after i cemented the silver out i tested the soulution and it tested postivie for pd so i filtered it one more time and then added dmg to to solution and let it sit overnight and it turning this yellowish black any insight on why this happened or why theres black in the solution? And help or advice would be greatly appreciated

 

[Lino1406]

Is there a meaningful amount of solids, either yellow or black?

 

[Jeff0172]

Not at all which is what i dont get im stumped just the solution is black and yellowwith no solids the solution tested postive for pallidium with sc im not sure if the amout is just to little to drop out of the solution or what

 

[Lino1406]

Sc check is not decisive enough. The amount if any do not justify treatment