Home / Standards / GB/T 7729-2021 GB/T 7729-2021 Active Chemical analysis of metallurgical products—General rule for spectrophotometric methods 冶金产品化学分析 分光光度法通则 Standard Type GBT ICS 77.080 CCS H04 Status 现行 Issue Date 2021-08-20 Implementation 2022-03-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A