Home / Standards / GB/T 1509-2006 GB/T 1509-2006 Abolished Manganese ores - Determination of silicon content - Perchloric acid dehydration gravimetric method 锰矿石 硅含量的测定 高氯酸脱水重量法 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 N/A