I used the ar method, had 2 much nitric , since no urea , tried to evaporate the nitric,unsuccessfully, since the smb failed to react.finally found urea at a dye store, added it,with a reaction. the color changed and became quite dark,almost blackish/blue/green. I saw black powder, all kinds about 5-6 grams I thought. it all seemed to dissappear somehow? I think it got stuck in the filter paper , since I had to filter it an extra time or two at the wrong times in the process. I have now washed the filters off using a spray bottle and water and have it in a large pyrex measuring cup . I am hoping this is where the remaining 4-5 grams of gold are at? or could they still be in the dark black/bluish liquid I have placed in my waste container? obviously i'm not testing for gold ,I know I should be , I have no test solution , I do have nitric though. & I have read an hour or 2 of that hoke as well among
other things . can anyone help me with this? I am now assuming the remainder of my cpu gold is in my yellow /water from the filter solution?