Nitric in AR test?

[sourdoughjoe]

Is there any test solution we can make and use or an element we can use to determine if ALL the Nitric has been completely used up in AR? Thanks...Joe!

 

[niteliteone]

Joe
This is what I have learned here so far, one of these ways should work for you.
By measuring the ph of the solution, you should have a reading above 1.0 to show the excess nitric has been consumed.
or...
Aside from only adding the nitric as needed in small increments until all material is consumed the easiest way is to have a small gold BB on hand to add to the AR solution to use up any excess.

Tom C.

 

[sourdoughjoe]

Thanks Tom!

 

[Smack]

One drop of Ferric Chloride Solution in AR, if you get red fumes there is still Nitric present. Just another way to test.

 

[Palladium]

http://goldrefiningforum.com/phpBB3/viewtopic.php?f=37&t=11459&p=112121&hilit=testing+nitric+urea#p112121

 

[niteliteone]

http://goldrefiningforum.com/phpBB3/viewtopic.php?f=37&t=11459&p=112121&hilit=testing+nitric+urea#p112121

Thank's Palladium,
I forgot about that one.

Tom C.

 

[sourdoughjoe]

Thanks for all the help guys...it has helped a lot. Later...Joe!

 

[gurudatta]

yes there is one test using starch paper ,u please find it i think starch paper in lead acetate on fumes shows colour change.