YB/T 547.4-1995 Methods for chemical analysis of vanadium slag The alkalimetric and reduced molybdobismuthylphosphoric acid photometric method for the determination of phosphorus content (English Version)
2014YB/T 547.4-2014 Vanadium slag.Determination of phosphorus conten.Bismuth phosphomolybdate blue spectrophotometric method
1995YB/T 547.4-1995 Methods for chemical analysis of vanadium slag The alkalimetric and reduced molybdobismuthylphosphoric acid photometric method for the determination of phosphorus content