Why we use 2N HNO3 and 6N HCl acid in plant P and S analysis respectively? why not vice versa?

Total P and S determination from plant sample digest we use Molybdate-vanadate  and Bacl2 solution for color development. Furthermore we use 2N nitric acid and 6N HCl for P and S determination...

21 November 2016 2,132 8 View