| abstract |
The invention provides a method for determining phosphorus content in iron and steel. The ethyl violet-phosphorus-molybdenum-vanadium heteropolyacid-surfactant system is used to determine the phosphorus content in iron and steel; after dissolving the steel to be tested, adding masking agent, sulfuric acid, The ammonium molybdate solution and the vanadium bottom solution are reacted to obtain a phosphorus-vanadium molybdenum heteropoly acid solution; the ethyl violet is complexed with the phosphorus-vanadium molybdenum heteropoly acid solution to obtain a phosphorus-vanadium molybdenum violet complex system; The surfactant is peptized with the phosphorus vanadium molybdenum violet complex system to obtain a test solution; the absorbance of the test solution is measured by a photometric method, and the phosphorus content in the steel to be tested is obtained by calculation. In the method for determining phosphorus content in iron and steel of the present invention, the ethyl violet-phosphorus vanadium molybdenum heteropolyacid-surfactant system has strong stability, short stabilization time, and fast measurement speed; and the measurement interference is small, with few interfering ions, Low detection limit and high measurement accuracy. |