8-羟基喹啉重量法测定搪瓷密着剂钼酸钡

Determination of Barium Molybdate Used for Enamel Product Adhesive Agent by 8-Hydroxyquinoline Gravimetric Method

研究了采用8-羟基喹啉重量法测定钼酸钡.钼酸钡用碱熔,EDTA作掩蔽剂,用氨水调节pH值至5.0时,用8-羟基喹啉沉淀钼,沉淀用砂芯漏斗过滤、干燥、称重.该方法回收率在98.54%～100.45%,相对标准偏差小于0.20%（n＝6）,该方法用于测定钼酸钡结果满意.

A new method was studied for determination of barium molybdate by 8 - hydroxyquinoline gravimetric method. The barium molybdate was fused by alkali,and the interference resulted from most of metal irons was masked by EDTA. When the acidity was controlled at pH 5.0 by ammonia, Mo was deposited by 8 -hydroxyquinoline. Then the deposit was filtered by sand cored funnel,and then dried and weighed. The rate of recovery is up to 98.54% -100.45% ,and the relative standard deviation is less than 0.20% （n =6）. This method can be readily used for the determination of barium molybdate.