Dear All,
Firstly... ever throw away filter papers for your gold chloride...
I got 4.8 grams from 6 batches of refined karat.
Second....for all newbies... there is nothing more disappointing than going to precipitate and that penny drops that you’ve messed it all up when nothing but a cloud of S02 comes your way....
Please see this link. Use option one/a.
http://www.freepatentsonline.com/3856507.html
I find hydroxide mixed at a far less ratio than they say here to be fine... I use 30 grams per 150ml of distilled water. This raises the ph to around 3 which is what you need for precipitation to occur efficiently. I use this per 500ml of aqua Regia.
As long as you haven’t used a ridiculous amount of excess nitric, it should also kill what’s left. If you are careful with your nitric additions it will
Hope this helped.
Firstly... ever throw away filter papers for your gold chloride...
I got 4.8 grams from 6 batches of refined karat.
Second....for all newbies... there is nothing more disappointing than going to precipitate and that penny drops that you’ve messed it all up when nothing but a cloud of S02 comes your way....
Please see this link. Use option one/a.
http://www.freepatentsonline.com/3856507.html
I find hydroxide mixed at a far less ratio than they say here to be fine... I use 30 grams per 150ml of distilled water. This raises the ph to around 3 which is what you need for precipitation to occur efficiently. I use this per 500ml of aqua Regia.
As long as you haven’t used a ridiculous amount of excess nitric, it should also kill what’s left. If you are careful with your nitric additions it will
Hope this helped.