http://www.goldnscrap.com Platinum Refining Tutorial – part 1.
A complete process is demonstrated:
– cleaning & Dissolution with Aqua Regia.
Learn more about Gold, Silver and Platinum group metals Recovery and Refining methods and process. http://www.goldnscrap.com
Resource for this work:
Refining Precious Metal Wastes – c.m. Hoke
The Recovery and Refining of Precious Metals – C. W. Ammen
The “gold refining forum”