粘土耐火材料中氧化钙和氧化镁分析

于六次甲基四胺分离铝、铁、钛等干扰元素后的滤液中，在PH≥12．5时，用EGTA标准溶液滴定钙量。在PH=10时。用EDTA标准溶液直接测定镁量，分析结果令人满意。

In the hexamethylenetetramine filtrate after the disturbing element, such as aluminum, iron and titanium have been removed, the content of the calcium is determined by EGTA titration with standard solution when the PH value is equal or more than 12.5. The magnesium is determined by EDTA titration with standard solution when the PH value is equal to 10. The result is proved to be satisfactory.