Home / Standards / GB/T 16416-2007 GB/T 16416-2007 Active Method of extraction for the determination of sodium and potassium in brown coal soluble in dilute hydrochloric acid 褐煤中溶于稀盐酸的钠和钾测定用的萃取方法 Standard Type GBT ICS 73.040 CCS D21 Status 现行 Issue Date 2007-11-01 Implementation 2008-06-01 Responsible Dept 中国煤炭工业协会 Drafting Unit N/A