That was my initial impression as well.
I did some reading and I think what i have here is calcium contamination.
It will pass through when AN is dissolved in water.
I think it goes partially like this
Ca + H2SO4 -> CaSO4 + H2
And then CaSO4 is somewhat soluble in nitric acid so it does not form precipitate. This will be easy to prove with small test reaction and flame test.
[Edited on 29-12-2017 by sipuli] |