Home / Standards / GB/T 24228-2009 GB/T 24228-2009 Active Chromium ores and concentrates - Methods of chemical analysis - General instruction 铬矿石和铬精矿 化学分析方法 通则 Standard Type GBT ICS 73.060.30 CCS D33 Status 现行 Issue Date 2009-07-15 Implementation 2010-04-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A