Home / Standards / GB/T 19421.5-2003 GB/T 19421.5-2003 Layered crystalline sodium disilicate test method — Determination of magnesium exchange capacity by EDTA volumetric method 层状结晶二硅酸钠试验方法 EDTA容量法测定镁交换能力 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A