Home / Standards / GB/T 6730.48-2021 GB/T 6730.48-2021 Active Iron ores—Determination of bismuth content— Dithiodiantipyryl methane spectrophotometric method 铁矿石 铋含量的测定 二硫代二安替吡啉甲烷分光光度法 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 N/A