Home / Standards / GB/T 1511-2006 GB/T 1511-2006 Abolished Manganese ores - Determination of calcium and magnesium contents - EDTA titrimetric method 锰矿石 钙和镁含量的测定 EDTA滴定法 Standard Type GBT ICS 73.060.20 CCS D32 Status 废止 Issue Date 2006-09-12 Implementation 2007-02-01 Responsible Dept 中国钢铁工业协会 Drafting Unit 中国钢铁工业协会