Home / Standards / GB/T 7731.17-2023 GB/T 7731.17-2023 Active Ferrotungsten—Determination of cobalt, nickel and aluminum contents—Inductively coupled plasma atomic emission spectrometric method 钨铁 钴、镍、铝含量的测定 电感耦合等离子体原子发射光谱法 Standard Type GBT ICS 77.100 CCS H11 Status 现行 Issue Date 2023-11-27 Implementation 2024-06-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A