Home / Standards / GB/Z 42521-2023 GB/Z 42521-2023 Active Iron ores—Recommended procedures for iron ore dissolution using either acid digestion or alkali fusion 铁矿石 试样的酸溶解或碱熔融方法 Standard Type GBZ ICS 73.060.10 CCS D31 Status 现行 Issue Date 2023-05-23 Implementation N/A Responsible Dept 中国钢铁工业协会 Drafting Unit N/A