莫尔盐容量法测定岩石矿物中微量金  

Mohr Salt Titrimetric Determination of Trace Gold

作　　者：李玉成 Li Yucheng

机构地区：[1]核工业部华南地质勘探局二九○研究所

出　　处：《岩矿测试》1988年第2期95-98,共4页Rock and Mineral Analysis

摘　　要：本文用作者合成的新试剂——钒金试剂做指示剂莫尔盐容量法测定微量金,终点突跃明显,操作简便,测定金范围宽。岩石矿物经磷酸——王水溶样,聚氨酯泡塑富集分离后测金较王水溶样回收完全。测金范围在0.0003—100g/t。试样测定的变动系数在21.6—1.62%范围。A new vanadate-gold indicator was applied successfully to the Mohr salt titrimetric determination of trace gold in minerals and rocks.The end point is indicated by a subtle disappearance of purple color.The sample was dissolved in a mixture of phosphoric acid and aqua regia and the gold was concentrated by the use of polyurethene foam.The range of determination was 0.0003-100 g Au/t.

关 键 词：莫尔盐 微量金 王水溶样 容量法测定 岩石矿物 新试剂 变动系数 富集分离 

分 类 号：O65[理学—分析化学]