Home / Standards / GB/T 6730.21-2016 GB/T 6730.21-2016 Active Iron ores—Determination of manganse content—Potassium periodate spectrophotometric method 铁矿石 锰含量的测定 高碘酸钾分光光度法 Standard Type GBT ICS 73.060.10 CCS D31 Status 现行 Issue Date 2016-10-13 Implementation 2017-09-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A