Home / Standards / GB/T 30072-2025 GB/T 30072-2025 Active Ferronickel—Determination of nickel content—EDTA titrimetric method 镍铁 镍含量的测定 EDTA滴定法 Standard Type GBT ICS 77.100 CCS H11 Status 现行 Issue Date 2025-08-29 Implementation 2026-03-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A