Home / Standards / GB/T 4702.1-2016 GB/T 4702.1-2016 Active Chromium metal—Determination of chromium content—The ammonium ferrous sulfate titrimetric method 金属铬 铬含量的测定 硫酸亚铁铵滴定法 Standard Type GBT ICS 77.100 CCS H11 Status 现行 Issue Date 2016-08-29 Implementation 2017-07-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A