Home / Standards / GB/T 6730.31-2017 GB/T 6730.31-2017 Active Iron ores—Determination of vanadium—N-benzoyl-N-phenylhydroxylamine extraction spectrophotometric method 铁矿石 钒含量的测定 N-苯甲酰苯胲萃取分光光度法 Standard Type GBT ICS 73.060.10 CCS D31 Status 现行 Issue Date 2017-09-07 Implementation 2018-06-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A