Home / Standards / GB/T 6730.9-2006 GB/T 6730.9-2006 Abolished Iron ores - Determination of silicon contents - The silicomolybdic blue spectrophotometric method reduce by ammonium ferrous sulfate 铁矿石 硅含量的测定 硫酸亚铁铵还原-硅钼蓝分光光度法 Standard Type GBT ICS 73.060.10 CCS D31 Status 废止 Issue Date 2006-11-01 Implementation 2007-02-01 Responsible Dept 中国钢铁工业协会 Drafting Unit 中国钢铁工业协会