prince
Member
Greetings and love to all
I have been working with some mobile boards, computer connectors, some RAM and some processors for the last few days.We heat them by mixing 1: 1 water and nitric acid.The gold plating is removed from there.I filter but some of them remain other metallic substances,Which I could not remove.I do aqua regia by adding 60 ml HCL and 20 ml nitric.I add other metals, including gold, to the middle of the aqua regia solution.Let's filter again,Then add some urea and add sodium metabisulfate,The result was that no drop of gold was worn and much more SMB was added and white powder was deposited under the beaker.
Later I found some black material by filtering with water,I tried to melt them but I couldn't find anything. It was like plastic.I am seeking the advice and opinions of the veterans.Hope i will benefit later. Thank you
I have been working with some mobile boards, computer connectors, some RAM and some processors for the last few days.We heat them by mixing 1: 1 water and nitric acid.The gold plating is removed from there.I filter but some of them remain other metallic substances,Which I could not remove.I do aqua regia by adding 60 ml HCL and 20 ml nitric.I add other metals, including gold, to the middle of the aqua regia solution.Let's filter again,Then add some urea and add sodium metabisulfate,The result was that no drop of gold was worn and much more SMB was added and white powder was deposited under the beaker.
Later I found some black material by filtering with water,I tried to melt them but I couldn't find anything. It was like plastic.I am seeking the advice and opinions of the veterans.Hope i will benefit later. Thank you