Stannous Questions

[Meteoriterocks21]

This is difficult to answer because Shor labels it’s chemicals specifically so you do not know what you are using. One thing strange is you ended up with a brown mud after the first drop. Now if that was a normal aqua regia reaction, you would have digested the mud from the first drop and had a beautiful red acid if the material digested was gold. The fact that it was green is a red flag. As is the fact it did not indicate positive on stannous.

Did you ever test your stannous chloride with a small drop of solution you know contains gold. That is the first thing I do when a stannous test is negative and I expect differently.

I think a few members who have experience with the Shor process should comment here.

I have an extremely red acid, it started bright yellow, then went to deep orange, now its deep red. Does dissolved iron also produce these colors as well?