Home / Standards / GB/T 20899.5-2021 GB/T 20899.5-2021 Active Methods for chemical analysis of gold ores—Part 5: Determination of lead content 金矿石化学分析方法 第5部分:铅量的测定 Standard Type GBT ICS 73.060.99 CCS D46 Status 现行 Issue Date 2021-08-20 Implementation 2022-03-01 Responsible Dept 国家标准委 Drafting Unit N/A