Home / Standards / GB/T 6730.25 GB/T 6730.25 Active Iron ores—Determination of total rare earth contents—Oxalate gravimetric method 铁矿石 稀土总量的测定 草酸盐重量法 Standard Type GBT ICS 73.060.10 CCS D31 Status 现行 Issue Date 2021-12-31 Implementation 2022-07-01 Responsible Dept 中国钢铁工业协会 Drafting Unit 中国钢铁工业协会