Home / Standards / GB/T 6730.13-2007 GB/T 6730.13-2007 Abolished Iron ores - Determination of calcium and magnesium content - EGTA-CyDTA titrimetric method 铁矿石 钙和镁含量的测定 EGTA-CyDTA滴定法 Standard Type GBT ICS 73.060.10 CCS D31 Status 废止 Issue Date 2007-08-14 Implementation 2008-03-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A