So, I acquired some old boards with connectors made in eastern Germany way back in 80s. To my surprise, quick "assay" (melt+XRF of the button) revealed that they are plated with gold and palladium. 4-5g/kg Pd and 3-4 g/kg Au to be more precise. I will have around 500-700 grams of them in the end. Some of them are higher grade (6-8g Pd/kg), some of them are lower grade (2g/kg Pd).
I know that it won´t be that much of a work to resolve Pd and Au. I plan to drop the gold with SMB or ferrous sulfate (once I read here that ferrous sulfate is better when platinum is in solution, but I don´t know how Pd would behave - and if it will be dragged with Au). Then scavenge Pd with DMG.
But there is numerous methods which can be performed. If anyone has working, tested procedure on how to resolve Pd and Au from AR solution, I would greatly appreciate it.
orvi
I know that it won´t be that much of a work to resolve Pd and Au. I plan to drop the gold with SMB or ferrous sulfate (once I read here that ferrous sulfate is better when platinum is in solution, but I don´t know how Pd would behave - and if it will be dragged with Au). Then scavenge Pd with DMG.
But there is numerous methods which can be performed. If anyone has working, tested procedure on how to resolve Pd and Au from AR solution, I would greatly appreciate it.
orvi