Analysis method of content of nitrosyl sulfuric acid, sulfuric acid and sulfur trioxide in nitrosyl sulfuric acid solution produced from oxynitride

The invention discloses an analysis method of the content of nitrosyl sulfuric acid, sulfuric acid and sulfur trioxide in nitrosyl sulfuric acid solution produced from oxynitride, which comprises the following steps that: (1) the nitrosyl sulfuric acid solution has hydrolysis and absorption reaction in water; (2) the content of nitrite, nitrate and sulfate in the solution is analyzed by a UV detector or an conductivity detector through high-efficiency liquid phase chromatography; (3) the content of NO2-, NO3- and SO42- in a sample is determined and converted and calculated into the content of NOHSO4, H2SO4 and SO3. The analysis method of the invention analyzes the content of all the components through the high-efficiency liquid phase chromatography, and has the advantages of novel analysis principle, advanced technology, wide scope of application, simple steps, short time consumed, low analysis cost, high analysis result accuracy, wide linear range, good reoccurrence, stable analysis condition and the like compared with a traditional potassium permanganate titrimetric method.