I bought 700g of 10k gold-filled women rings expecting about 17g recovery. The rings arrived and after removing the stones was left with 580g. That should be about a 11g recovery.
I washed everything in a ultra sonic cleaner, then used a propane torch to incinerate the rings. Used distilled water and nitric acid to remove the base metals. Filtered the foils and incinerated again filter and all. Put everything into aqua regia and used smb to precipitate the gold. I only came up with 7.654g trying to figure out what I did wrong .
By the way this is my first post, have been reading a lot for a few months. I have learned so much from all of you, thank you.
I washed everything in a ultra sonic cleaner, then used a propane torch to incinerate the rings. Used distilled water and nitric acid to remove the base metals. Filtered the foils and incinerated again filter and all. Put everything into aqua regia and used smb to precipitate the gold. I only came up with 7.654g trying to figure out what I did wrong .
By the way this is my first post, have been reading a lot for a few months. I have learned so much from all of you, thank you.