摘要
矿样经酸分解后,用硫酸肼还原,将Mo(Ⅵ)还原为Mo(Ⅴ),用8-羟基喹啉除去过量的硫酸肼,然后以钒试剂为指示剂,用钒酸铵滴定Mo(Ⅴ)。方法应用于尾矿样品中钼的测定,加标回收率为99.33%～102.00%,对含钼(质量分数)3.54%的样品重复测定5次,RSD为0.51%;适用于1%以上钼的测定。
A pollut -free method for the determination of molybdenum in molybdate is described which avoids the interference by negative ion . The sample is decomposed by acid attact. The molybdenum （Ⅵ） in sample solusions is reduced to molybdenum （ Ⅴ ） by hydrazine sulfate and the excess of hydrazine sulfate can be removed by 8 - hydroxyquinoline. The molybdenum （Ⅴ） is titrated with ammonium metavanadate.
出处
《中国钼业》
2007年第5期43-44,共2页
China Molybdenum Industry
关键词
钼
滴定
硫酸肼
钒酸铵
molybdenum
titration
hydrazine sulfate
ammonium metavanadate
