gold presents testing liquid

[Anonymous]

Hello does any one know the scientific name for gold testing liquid the type ypu place on to paper and add a drop of your disolves gold solution to see if all the gold has been dropped out of the solution ?
and What percentage strength does net nitric and hydrochloric acid at the moment I can get hydro AT 68% strength and nitric at 32%
any help would be great
thanks Lee in Australia

 

[Oz]

I only understand the first question, and that would be a stannous chloride solution.

 

[Harold_V]

Stannous chloride, as has been suggested. Read Hoke.

You have your acids reversed. One does not purchase HCl @ 68%, but it's likely you can buy nitric at that level of concentration. Both are perfectly well suited to refining precious metals.

Welcome to the forum.

Harold

 

[goldsilverpro]

Lee,

I think you got the numbers reversed.

 

[Irons]

There is Nitric at over 90%, White and Red fuming Nitric acid. If you start asking around for it, you might get a visit from the authorities, though.

http://en.wikipedia.org/wiki/Red_fuming_nitric_acid