硫脲浸取-光度法测定硫化矿中金  

Determination of Gold in Sulfurized Minerals by Spectrophotometry with Thiourea Sample Decomposition

作　　者：刘建[1] 闫英桃[1] 赵岗 袁秀茹 

机构地区：[1]西安工程学院应用化学系,西安710054

出　　处：《岩矿测试》2000年第1期74-76,79,共4页Rock and Mineral Analysis

摘　　要：常温下在H2 C2 O4 -H2 SO4 介质中 ,用 50 g/L硫脲 (Tu)溶液可完全浸提含金硫化矿中Au,对金的浸取率可达 99.8% ,然后使用CL -P2 0 4 萃淋树脂富集含金分解液中Au(Tu) + 2 ,结晶紫分光光度法测定。方法用于硫化原生矿及含硫浮选精矿中Au的测定 ,所得结果与王水分解原子吸收法测定相符 ,其RSD(n =5) <3%。In the medium of H 2C 2O 4 H 2SO 4 gold in sulfurized minerals can be decomposed by 50 g/L of thiourea solution with 99.8% of leaching out efficiency for gold. Gold then can be concentrated by chromatography with CL P 204 resin and determined by spectrophotometry with crystal violet. The method has been applied to determination of gold in crude and concentrated sulfurized minerals. The results are in agreement with those provided by AAS with aqua regia sample decomposition. The precision is <3% RSD( n =5).

关 键 词：金 硫脲 CL-P204 萃淋树脂 硫化矿 光度法 

分 类 号：P578.11[天文地球—矿物学] P575.9[天文地球—地质学]