A Simple and Accurate Way to Assay the Concentration of Nitric Acid——Back-titration Method

摘要

Using 1mol/L （NH₄）₂SO₄-aturated （NH₄）₂C₂O₄ as a masking reagent, V-△V/△pH, V-pH and back-titration methods are used to assay the concentration of nitric acid under various conditions and theresults are compared with that from phenolphthalein indicator method. It is shown that the data treatment