GB/T 8704.6-2020 Ferrovanadium—Determination of silicon content—The sulfuric acid dehydration gralimetric method and the silicomolybdic blue photometric method
2020GB/T 8704.6-2020 Ferrovanadium—Determination of silicon content—The sulfuric acid dehydration gralimetric method and the silicomolybdic blue photometric method
2007GB/T 8704.6-2007 Ferrovanadium- Determination of silicon content The sulphuric acid dehydration gravimetric method
1994GB/T 8704.6-1994 Methods for chemical analysis of ferrovanadium. The sulphuric acid dehydration-gravimetric method for the determination of silicon content