Home / Standards / GB/T 6730.89-2024 GB/T 6730.89-2024 Active Iron ores—Determination of thorium content—Arsenazo Ⅲ spectrophotometric method 铁矿石 钍含量的测定 偶氮胂Ⅲ分光光度法 Standard Type GBT ICS 73.060.10 CCS D31 Status 现行 Issue Date 2024-05-28 Implementation 2024-12-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A