Home / Standards / GB/T 20899.7-2022 GB/T 20899.7-2022 Active Methods for chemical analysis of gold ores—Part 7: Determination of iron content 金矿石化学分析方法 第7部分:铁量的测定 Standard Type GBT ICS 73.060.99 CCS D46 Status 现行 Issue Date 2022-12-30 Implementation 2023-07-01 Responsible Dept 国家标准委 Drafting Unit N/A