TLumsbay
Member
While I'm waiting for my 1,300 grams of pins to digest, I started micro-scrapping going through the DVD devices from the 200 laptops I'm processing. I collected all the laser diodes and anything else that was interesting (Mostly tiny ribbon flat packs and wafer laser diodes-pictured). After mechanically separating the base metals, I incinerated the remains and washed them in DH2O. My thought was to wash them briefly in AR and stop the reaction before the base metals started to displace any collected PM's, precipitate and refine from there. Started with 130 grams of washed material. After ~ 20 mins The liquor tested positive for trace Au so I continued, after another 10 mins test was negative for Au but lit up yellow. So I decided to just get everything into solution and deal with it from there. It took the whole day at 90C with silver particulates the last to go. Today, I evaporated to a syrup and rehydrated x2 with HCl and ended up with the pictured stannous assay. Top left is the control, bottom left is after 20 minute wash .Top right is the control, bottom right is the stannous result after full digestion. I'm not sure where it may have came from, but I suspect PGM's. There's obviously no significant financial value here so I'd like to cash in on the educational value.
Where should I go from here in assaying the contents? Thank you for all your help.
Where should I go from here in assaying the contents? Thank you for all your help.