[tunadam]

I have ion values of salt leachates from chemical analysis, all are in mg/L unit (or ppm). The salt what I want to calculate from the leachate is ammonium alum, therefore it contains NH₄, however, I have NO₃ values measured. How can I calculate NH₄ from NO₃ values?

Thanks

[Orcio_87]

How can I calculate NH4 from NO3 values?

You want to know conc. of Al(NH₄)(SO₄)₂, but instead someone measured concentrations of NO₃^- ?

Nothing can be done here, but to measure NH₄⁺ this time.