2018YS/T 540.1-2018 Methods for chemical analysis of vanadium Part 1: Determination of vanadium content Potassium permanganate-ferrous ammonium sulfate titration method
2006YS/T 540.1-2006 Vanadium chemical analysis method Potassium permanganate-ferrous ammonium sulfate titration method for determination of vanadium content
YS/T 540.1-2006 Vanadium chemical analysis method Potassium permanganate-ferrous ammonium sulfate titration method for determination of vanadium content has been changed from GB/T 8639.1-1988 Vanadium--Determination of vanadium content--Potassium permanganate-ammonium ferrous sulphate volumetric method.