GB/T 6730.31-1986 Methods for chemical analysis of iron ores--The benzoylphenylhydroxylamine extraction photometric method for the determination of vanadium content (English Version)
This standard applies to the determination of vanadium in iron ore, iron concentrate, sinter and pellets. Measuring range: 0.025~0.300%.
GB/T 6730.31-1986 history
2017GB/T 6730.31-2017 Iron ores—Determination of vanadium—N-benzoyl-N-phenylhydroxylamine extraction spectrophotometric method
1986GB/T 6730.31-1986 Methods for chemical analysis of iron ores--The benzoylphenylhydroxylamine extraction photometric method for the determination of vanadium content