Home / Standards / GB/T 45480-2025 GB/T 45480-2025 Active Manganese ores and concentrates—Determination of aluminium content—Photometric and gravimetric methods 锰矿石和锰精矿 铝含量的测定 光度法和重量法 Standard Type GBT ICS 73.060.20 CCS D32 Status 现行 Issue Date 2025-03-28 Implementation 2025-10-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A