摘要
试样用硫酸、硫酸钾溶解,借助定性滤纸中碳在高温环境中将锑(V)还原成锑(III),在酸性溶液中锑(III)能被硫酸铈氧化成锑(V),过量的硫酸铈可以使甲基橙褪色,用以确定滴定终点。通过试验确定了酸度、温度、共存杂质离子等条件,方法相对标准偏差(RSD)小于0.65%,实际样品加标回收率在99.2%～101.1%之间。本方法采用硫酸铈滴定法测定锑矿中锑的含量,简单、快速、准确,能满足锑矿分析的需要,反应式:Sb3++2Ce4+→Sb5++2Ce3+。
Dissolving the sample with sulfuric acid, potassium sulfate, with the qualitative filter paper, carbon antimony （V） in a high temperature environment will be reduced to antimony （III）, the cerium sulfate antimony （III） can be oxidized to antimony （V） in acidic so- lution, excess sulfuric acid cerium methyl orange fade, to determine the endpoint of the titration. Through testing to determine the conditions of acidity, temperature, the coexistence of impurity ions, the relative standard deviation （RSD） is less than 0. 65%, the actual spiked recov- ery rate is between 99.2% and 101.1%. The method using cerium sulfate titration to determine the antimony content in ore with simple rapid and accurate, and can meet the needs of the antimony ore analysis. The reaction formula is ： Sb3 ＋ ＋ 2Ce4＋ ---Sb5＋ ＋ 2Ce3＋.
出处
《铜业工程》
CAS
2012年第6期12-14,共3页
Copper Engineering
关键词
锑矿
定性滤纸
硫酸钾
硫酸铈
甲基橙
容量法
antimony ore
qualitative filter paper
potassium sulfate
cerium sulfate
methyl orange
volumetric method
