Home / Standards / GB/T 6730.47-2017 GB/T 6730.47-2017 Active Iron ores—Determination of niobium content—Sulfochlorophenol S spectrophotometric method 铁矿石 铌含量的测定 氯代磺酚S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