bswartzwelder
Well-known member
- Joined
- Oct 24, 2011
- Messages
- 660
I recently purchased a pound of "Gold scraps recovery - gold pin recovery" from aperson on eBay. They arrived this week and for some strange reason, they appear to be copper with no gold visible. Before I make a complaint to eBay, I want to test a small batch of these pins.
I plan to take 1 gram of pins (about 6) and put them in a small glass. Then I'll add 4 to 5 ml of 32% HCl and 2 ml or 3 ml of Chlorox. Let everything sit until all metal dissolves and then test a drop of the solution on a paper towel with a drop of Stannous Chloride solution. If it turns dark, I'll know that there is gold present. If it doesn't turn dark, then I'll assume no gold is present. Does anyone see any problems doing it this way? Unfortunately, it is cold here in Maryland and leaving everything sitting out on the deck will mean the reaction will be slow. Maybe I could preheat the HCl and Chlorox before adding it to the chips. Any suggestions/criticism (as always) will be welcome. After all, criticism shows me where I might make a mistake and if possible, I want this to be as error free as possible.
I plan to take 1 gram of pins (about 6) and put them in a small glass. Then I'll add 4 to 5 ml of 32% HCl and 2 ml or 3 ml of Chlorox. Let everything sit until all metal dissolves and then test a drop of the solution on a paper towel with a drop of Stannous Chloride solution. If it turns dark, I'll know that there is gold present. If it doesn't turn dark, then I'll assume no gold is present. Does anyone see any problems doing it this way? Unfortunately, it is cold here in Maryland and leaving everything sitting out on the deck will mean the reaction will be slow. Maybe I could preheat the HCl and Chlorox before adding it to the chips. Any suggestions/criticism (as always) will be welcome. After all, criticism shows me where I might make a mistake and if possible, I want this to be as error free as possible.
